Malicious PDF — malware analysis report

Static analysis result for SHA-256 ab04a9e45004da41…

MALICIOUS

PDF

83.1 KB Created: 2021-09-18 13:43:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: d0475518637fdaef1d451a121d607668 SHA-1: 3e655f99f04566fc5b71fdd0e31036be48a04880 SHA-256: ab04a9e45004da410dfc1d6c3a62d5645e7e39f1a5d3f5e81dc53ab08be46591
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous external links, many pointing to compromised WordPress sites or disposable hosting, indicative of a link farm used for phishing or malware distribution. The ML classifier and ClamAV detection strongly suggest malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded URLs are sufficient to infer a malicious link farm attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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 https://drafthe.ru/uplcv?utm_term=how+to+photo+recovery+in+android PDF link annotation
    • http://ingmarcofaedi.com/userfiles/files/1884321728.pdfIn PDF document text
    • https://bokaichenyu.com/upload/files/dirajumajudumikedenimifa.pdfIn PDF document text
    • http://aqua4you.hu/userfiles/file/zitedakirolidexi.pdfIn PDF document text
    • http://www.reroofingbrisbaneqld.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/161331a83ded0d---newamopupe.pdfIn PDF document text
    • http://dichvuhangngay.vn/uploads/image/files/45126881349.pdfIn PDF document text
    • https://fajanav.com/aym_image/files/69545687784.pdfIn PDF document text
    • https://univerosg.com/ckfinder/userfiles/files/53607110663.pdfIn PDF document text
    • http://enovosti.info/ckfinder/userfiles/files/87097914483.pdfIn PDF document text
    • http://jyjjapan.jp/files/ckeditor/files/nozolelapasumafop.pdfIn PDF document text
    • https://unitedcardsolutions.com/wp-content/plugins/formcraft/file-upload/server/content/files/161302fc3192bf---80951381470.pdfIn PDF document text
    • https://uudanbury.life/files/file/rurixirowozawufuxe.pdfIn PDF document text
    • https://dodatnojamstvo.com/userfiles/file/26035735553.pdfIn PDF document text
    • http://cabanagarden.hu/editor_up/numebaxasezu.pdfIn PDF document text
    • https://bitree.ru/ckfinder/userfiles/files/ginobogedelej.pdfIn PDF document text
    • http://www.logomarcanet.com/userfiles/file/gefazegijelu.pdfIn PDF document text
    • https://wrd13.com/force/file/melitodopoduvi.pdfIn PDF document text
    • https://rajatotogroup4.com/contents/files/vorodiwugurijedanewiz.pdfIn PDF document text
    • https://fmpride.com/wp-content/plugins/super-forms/uploads/php/files/73e9a02df47aac51beaf7d41777f1965/laxemakal.pdfIn PDF document text
    • http://protectakoteasia.com/ckfinder/userfiles/files/nolunusunadogasuremep.pdfIn PDF document text
    • https://eprobatdz.com/ckfinder/userfiles/files/rodat.pdfIn PDF document text
    • http://kipia-nn.ru/userfiles/file/tuseduteg.pdfIn PDF document text
    • https://masterok-kovka.ru/wp-content/plugins/super-forms/uploads/php/files/006f476157181d34ee46fce5369c8fe8/lasufelogalijasufilovuvaj.pdfIn PDF document text
    • http://matonaklawfirm.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/puperimerobiwe.pdfIn PDF document text
    • https://greengenome.in/admin/userfiles/file/rukafeboxaxodu.pdfIn PDF document text
    • 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_off0000deb8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDEB8 18144 bytes
SHA-256: e6af2701c38325bd7172ddede8850bc941455b24fabe7eb9722f03b46218c1c4
font_01_sfnt_off00010deb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10DEB 10652 bytes
SHA-256: b888760a4fe88e35bec9f048c5aee23451d17c54f0ae1063afe201827328dba6
font_02_sfnt_off0001264e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1264E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.