Malicious PDF — malware analysis report

Static analysis result for SHA-256 e3be456260943d34…

MALICIOUS

PDF

88.2 KB Created: 2021-09-01 00:27:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: a88d2f300c60bf7aba8fcd69befb97d9 SHA-1: 549d27b70a1a25574fb4a2924deca8fe9cb13df4 SHA-256: e3be456260943d34dd6ca4605d8f6cb81f6a4e2abccc20bdbcca5dc418651dbb
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to compromised CMS upload directories or disposable hosting, indicating a link farm designed to redirect users to potentially malicious sites. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • 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 http://heninrealty.com/userfiles/files/72091066515.pdf In PDF document text
    • http://papaicountrylodge-longstay.com/user_img/files/19613466658.pdfIn PDF document text
    • http://sewakendragroup.com/userfiles/file/84639764158.pdfIn PDF document text
    • http://vlaamspatientenplatform.be/_plugin/ckfinder/userfiles/files/jemavosikagoje.pdfIn PDF document text
    • http://happypalettebnb.com/CKEdit/upload/files/sisuporejaxomabinidowono.pdfIn PDF document text
    • https://ajur.rest/uploads/userfiles/file/jagasitefuvovedexegegeta.pdfIn PDF document text
    • http://kubabus.cz/novy-web/upload/file/77960430753.pdfIn PDF document text
    • https://rainbowprinter.com/app/webroot/files/file/forafevasa.pdfIn PDF document text
    • http://elskenecologie.nl/files/68982442919.pdfIn PDF document text
    • http://www.zopfitravel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160af9ebba5ba8---dojobetogefigonad.pdfIn PDF document text
    • http://bjerkelunden.org/content/files/userfiles/file///28023884214.pdfIn PDF document text
    • http://zadonskiy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160bcb4cd67232---72318822192.pdfIn PDF document text
    • http://geology.ie/wp-content/plugins/formcraft/file-upload/server/content/files/16073d8485d0d9---fawomakifawuxutemukuxob.pdfIn PDF document text
    • http://vindindex.nl/images/uploads/29376370298.pdfIn PDF document text
    • https://ajitcoatings.com/uploads/29342491139.pdfIn PDF document text
    • https://moolans.com/uploads/files/tuvegitaminebap.pdfIn PDF document text
    • http://thetsaban3watnuea.com/UserFiles/file/lowomunonuma.pdfIn PDF document text
    • https://papersacksfactory.ae/images/bulk_images/files/78107042857.pdfIn PDF document text
    • http://www.colormotion.cz/UserFiles/file/duforawuwa.pdfIn PDF document text
    • https://davidfoleyinc.com/userfiles/file/xamegakubelafosurebakuj.pdfIn PDF document text
    • http://ipea.kr/userData/board/file/932752544.pdfIn PDF document text
    • http://medica-eg.com/userfiles/file/24629911742.pdfIn PDF document text
    • http://argentum.com/wp-content/plugins/super-forms/uploads/php/files/100qftodmcfvbqde63dhhel8eo/82976861086.pdfIn PDF document text
    • http://kasargod.net/uploads/file/64651535206.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/6naE_Nh8_CY/uplcv?utm_term=the+gift+of+the+magi+answers+key+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_off0000f00f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF00F 11156 bytes
SHA-256: 9e1ca40ca2c008fcbc588ad226e58d546e272b4898ec2bad734e2a226221344a
font_01_sfnt_off000109da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109DA 19276 bytes
SHA-256: 2d2074085f5b429e769cec3c8d683b948bac5dc5cd9981ec1e5598ad3d95d1dc
font_02_sfnt_off00013c11.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13C11 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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