Malicious PDF — malware analysis report

Static analysis result for SHA-256 4c29e6c92284a504…

MALICIOUS

PDF

81.1 KB Created: 2021-09-06 18:10:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-04
MD5: e313695f1c7b020f55cab4109ccd6c2a SHA-1: cf753b1f8dbddd39577d454ee848d9fd1a32314b SHA-256: 4c29e6c92284a5045777ed4c0454f29ef37e202da778556d9df81b253a56781c
212 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The heuristics suggest it functions as a phishing lure, impersonating a brand (Apple) and presenting a fake invoice or download button to trick users into clicking malicious links. These links often point to compromised WordPress upload storage or disposable hosting, likely serving as a distribution point for further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

Heuristics 9

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Brand-impersonation credential phishing lure high SE_BRAND_CREDENTIAL_PHISH
    Document impersonates a well-known consumer brand and uses account-security / verification language ('unusual activity', 'account on hold', 'verify your account') to steer the reader to a credential-harvesting link. Corroborated by: call-to-action link host does not match the impersonated brand: https://feedproxy.google.com/~r/skout/mBVl/~3/A3Ryygt5BCM/uplcv?utm_term=meeseva+residence+certificate+application+form+in+telugu+pdf.
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://lorenzonimmigrationlaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b3abb70a150---86187369206.pdf In PDF document text
    • https://otdelkamos.ru/wp-content/plugins/super-forms/uploads/php/files/7496a246e84c145493fce535f77dfc9a/sosikiwudejodovedevo.pdfIn PDF document text
    • https://xn--64-mlcufjjaii0l.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/ea8ded2ccf3881bf4def3ea0c7d34c9e/zugevebavifala.pdfIn PDF document text
    • http://sequirk.ie/userfiles/file/80868775455.pdfIn PDF document text
    • https://israelonthehouse.com/wp-content/plugins/formcraft/file-upload/server/content/files/16123ad65187b6---jizesulisimafilosoti.pdfIn PDF document text
    • http://tatagz.com/uploadfile/files/kudevonidazevepitegag.pdfIn PDF document text
    • http://www.sunargrup.com.tr/wp-content/plugins/super-forms/uploads/php/files/bl9rh4vqlc4f5s94798jbc5st4/67372869507.pdfIn PDF document text
    • http://levne-pohary.cz/UserFiles/File/mixufovezamo.pdfIn PDF document text
    • http://vudafrique.com/wp-content/plugins/super-forms/uploads/php/files/584699e6a4049e8351c7dc15d22eba63/76132413308.pdfIn PDF document text
    • http://aprt1day.ru/file/91656634797.pdfIn PDF document text
    • http://www.whirlpool-beachcomber.at/wp-content/plugins/formcraft/file-upload/server/content/files/160e7fc720d7cb---gubasulivejozupu.pdfIn PDF document text
    • http://limpiasol.com/wp-content/plugins/formcraft/file-upload/server/content/files/16133114a3a447---womuve.pdfIn PDF document text
    • https://armenia4d.com/contents/files/29192072987.pdfIn PDF document text
    • http://letsbelegal.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/42993295612.pdfIn PDF document text
    • http://tai-yang.tw/taiyang/upload/file/28891780902.pdfIn PDF document text
    • http://tiszaikaland.hu/upload/file/divoribizuwasafajevil.pdfIn PDF document text
    • http://tubemakingmachine.com/uploadfile/files/bufifamisugese.pdfIn PDF document text
    • http://dainichiji.com/upload_ckr/files/70224861849.pdfIn PDF document text
    • http://avanti-kuhni.ru/upload/files/sokefotepuvibenuzi.pdfIn PDF document text
    • http://alphabodysupplements.com/newerac2c/userfiles/file/mipinanixub.pdfIn PDF document text
    • https://www.lipfish.no/wp-content/plugins/formcraft/file-upload/server/content/files/1607c2d08039ff---6254519844.pdfIn PDF document text
    • https://tamtam.com.ua/wp-content/plugins/super-forms/uploads/php/files/a76fd7a0ba93495e512992165374a99e/sizixajukuderuki.pdfIn PDF document text
    • http://www.alexgis.com/siteuploads/editorimg/file/70179436543.pdfIn PDF document text
    • http://amandatravel.com/userfiles/file/xuxenewazit.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/A3Ryygt5BCM/uplcv?utm_term=meeseva+residence+certificate+application+form+in+telugu+pdfPDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d9bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9BC 11124 bytes
SHA-256: 8faf24a02162199ce5414448fbcca89f096de782b2610835f8e42995ed78dab3
font_01_sfnt_off0000f383.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF383 16612 bytes
SHA-256: 5cb6aea0c4ba202acf71435658eb8de525438519657549fe68c20ed5371b58fd
font_02_sfnt_off00011e66.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E66 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1