Malicious PDF — malware analysis report

Static analysis result for SHA-256 f00b801ccbb93d46…

MALICIOUS

PDF

83.6 KB Created: 2021-08-02 07:44:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: aa7491f8682bc7618a6349b7737c83ba SHA-1: c3fe8c0c3efbb309ed90b5dbe3bc40afe1bba629 SHA-256: f00b801ccbb93d4637d66469202fec6f3d47dcdb0a8bfd769f31824ede3fc10e
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by ClamAV and an ML classifier. It uses a password-protected-archive lure. The file embeds a large number of external links characteristic of an SEO link farm, many hosted on compromised CMS upload directories. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9912

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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 https://patriciobanados.cl/upload/file/ In PDF document text
    • http://allprintusa.com/admin/images/file/38531445828.pdfIn PDF document text
    • https://wacee.net/wp-content/plugins/formcraft/file-upload/server/content/files/160dcdc8331aae---morid.pdfIn PDF document text
    • https://angel-juicer.com/FileData/ckfinder/files/20210611_5F079038AE6284DA.pdfIn PDF document text
    • http://bjsprt.com/uploadfile/file///2021052722184128.pdfIn PDF document text
    • https://oriental-kitchens.com/userfiles/files/23446260539.pdfIn PDF document text
    • https://www.hediyevideo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160806048f1f55---sabaw.pdfIn PDF document text
    • https://www.sahabatkeluargahomecare.com/wp-content/plugins/formcraft/file-upload/server/content/files/160efd8e0701c0---nasone.pdfIn PDF document text
    • https://neoville.ru/wp-content/plugins/super-forms/uploads/php/files/69eb905795d8e6c3b4df6589bd71a0af/nanumusovajozetopa.pdfIn PDF document text
    • http://ledseoul.com/userData/board/file/49574495068.pdfIn PDF document text
    • http://pechati-piter.ru/userfiles/file/36852259079.pdfIn PDF document text
    • https://vieclamlaocai.vn/webroot/img/files/40013474968.pdfIn PDF document text
    • https://newat.ru/wp-content/plugins/super-forms/uploads/php/files/7a4721f4964f9672344e8481b818c826/14354992366.pdfIn PDF document text
    • http://villaturri.it/wp-content/plugins/formcraft/file-upload/server/content/files/1608e2fcb03e81---tomanonanotabujul.pdfIn PDF document text
    • https://ols.lighting/wp-content/plugins/super-forms/uploads/php/files/a46749323dc62868134ca4d4d6bd8708/fiwevov.pdfIn PDF document text
    • http://subventionsbetrug.de/wp-content/plugins/super-forms/uploads/php/files/0c3488t2g785m5jt8q9mv10v2g/wupixax.pdfIn PDF document text
    • https://estidevelopers.com/wp-content/plugins/super-forms/uploads/php/files/bdd215b4cb0631327ae60de6c14011b7/bofipabonale.pdfIn PDF document text
    • https://consultingexpert.eu/fckeditor/userfiles/file/9592722917.pdfIn PDF document text
    • https://moderator.lt/components/com_mijoshop/opencart/image/data/files/navunalu.pdfIn PDF document text
    • http://rittenhousereunion.com/clients/a/ad/ad7d26974070b67854a29702aed78614/File/14553379702.pdfIn PDF document text
    • http://lindendirect.com/tempimg/file/36404486468.pdfIn PDF document text
    • https://trucraftsmanship.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b0e5fa3b990---75238948574.pdfIn PDF document text
    • https://soechi.com/userfiles/file/68231182948.pdfIn PDF document text
    • https://berettyotv.hu/userfiles/files/96667272511.pdfIn PDF document text
    • https://www.autodepotperformancegroup.ca/wp-content/plugins/super-forms/uploads/php/files/n2k8pnj41nfkmguims78buj010/nolofu.pdfIn PDF document text
    • https://webtraffic.ch/wp-content/plugins/super-forms/uploads/php/files/g7nmirau4laah9ee325d3r2ogj/lavaxa.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/YTWXjIUwRh0/uplcv?utm_term=dragon+ball+z+tenkaichi+tag+team+unlock+all+characters+cheatPDF 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_off0000db49.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB49 18376 bytes
SHA-256: e29578da0d681157df1256537d462ff26bf3148ac2c46520e9ec31eff6afb0f2
font_01_sfnt_off00010c1a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C1A 11072 bytes
SHA-256: ec8b9575949a396eaa0ac5e0a858bf120f225b4e7a5b66e398dc31591caad8b3
font_02_sfnt_off000125ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x125BA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1