Malicious PDF — malware analysis report

Static analysis result for SHA-256 cac69dbcc88d29e0…

MALICIOUS

PDF

83.7 KB Created: 2021-09-20 20:12:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 5f443426eaa7a46f868377ee241a5dff SHA-1: 7d4f5debf03d7c407d6976a245edba8b88c7b86d SHA-256: cac69dbcc88d29e044f783ad6a0fba5bc86127c5698033aeaeaacaa6d59cbc38
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It functions as a link farm, containing numerous embedded URLs pointing to external sites, many of which are hosted on suspicious domains. While no scripts were explicitly extracted, the PDF structure and the presence of many external links suggest an attempt to lure users to malicious content or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://banderlogclub.ru/Files/file/mojukibuvomumiwixifapi.pdf In PDF document text
    • http://corporatiegids.nl/uploads/files/nulexibumivarozidozapadet.pdfIn PDF document text
    • https://dienmayminhchau.vn/uploads/news_file/17631677944.pdfIn PDF document text
    • http://pantryscan.com/123cars/imagefck/file/xokite.pdfIn PDF document text
    • http://cannamelis.com/userfiles/file/towadimusatejugivagizo.pdfIn PDF document text
    • http://woori-tour.kr/FileData/ckfinder/files/20210911_A0A3D88F49F7E112.pdfIn PDF document text
    • http://tunesistudio.eu/userfiles/files/gowanesavigud.pdfIn PDF document text
    • https://autoskola-scp.com/files/bobebaxa.pdfIn PDF document text
    • http://jan-fotografie.nl/upload/files/10568436237.pdfIn PDF document text
    • http://riasztoszolnok.hu/admin/fck_upload/file/wetaridujakomatisafugi.pdfIn PDF document text
    • http://veterinariogiardinelli.it/userfiles/files/wakizikov.pdfIn PDF document text
    • http://www.pratikchoudhury.com/fckimages/file/tijuxiposarelulodaforudek.pdfIn PDF document text
    • https://frennphotography.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613f01d1dcafb---59802310162.pdfIn PDF document text
    • https://noticky.net/akce/fotky/file/remipejepen.pdfIn PDF document text
    • https://sharjahcements.com/images/bulk_images/files/92476614175.pdfIn PDF document text
    • http://cohn-vossen.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613ac7ae39b19---91190418781.pdfIn PDF document text
    • http://shopphutungmayphat.com/upload/img/files/kofateropubaj.pdfIn PDF document text
    • http://vladekoservis.ru/files/keniviboxisudog.pdfIn PDF document text
    • http://sbkf.org/files/files/wubabumira.pdfIn PDF document text
    • https://vico-immobilien.com/ckfinder/userfiles/files/13122531720.pdfIn PDF document text
    • http://www.xzass.org/ckfinder/userfiles/files/dakisetarutaforusaxat.pdfIn PDF document text
    • https://ibexquimica.com.br/ckfinder/userfiles/files/70312393101.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1KS0DP0cxss/uplcv?utm_term=after+trillion+comes+whatPDF 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_off0000e04c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE04C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f85e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF85E 18444 bytes
SHA-256: bf83e79a735423b0963a0e0570daaa321a54d0db05997e020d8a3570e0a6600a
font_02_sfnt_off0001289e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1289E 10668 bytes
SHA-256: db4f2e3b5e15415b3b7f02224ba7ccecea4c5b87067738a001cc1e206c21f2be

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