Malicious PDF — malware analysis report

Static analysis result for SHA-256 6ed0c29c6a16d526…

MALICIOUS

PDF

85.5 KB Created: 2021-09-09 17:13:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 57f945e68521566d678f4b7ae0938e5a SHA-1: 6c949095d003b0dbccb515fb5383b517ee21094a SHA-256: 6ed0c29c6a16d5267b5f4d19a6e7cbed38ebe3e654539b1c2352894e3f0bcf85
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was flagged by ClamAV as 'Pdf.Phishing.Trojan' and a machine learning classifier indicated a high probability of maliciousness. Heuristics identified it as a link farm, with numerous embedded URLs pointing to various domains, some of which are associated with compromised CMS uploads or disposable hosting. The document body is unreadable, but the presence of multiple external links suggests an attempt to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://vssteel1999.com/ckeditor/userfiles/files/47207171316.pdf In PDF document text
    • http://jshtextile.com/UserFiles/file///ruzoxixekewor.pdfIn PDF document text
    • https://www.hauptsache.cc/wp-content/plugins/formcraft/file-upload/server/content/files/161310eef8f445---35145995860.pdfIn PDF document text
    • http://infoegrafica.com/userfiles/files/rotux.pdfIn PDF document text
    • https://caror.hu/ckfinder/userfiles/files/jetidavegugivinux.pdfIn PDF document text
    • http://immsac.pe/sgi_userfiles/userfiles/files/18739529490.pdfIn PDF document text
    • http://radtel-sport.pl/userfiles/file/nobufep.pdfIn PDF document text
    • http://saconsultancy.com/userfiles/file/xefope.pdfIn PDF document text
    • http://tomaszskiba.com/userfiles/file/27866107248.pdfIn PDF document text
    • https://resulgame.com/calisma2/files/uploads/dekorigizojajarexog.pdfIn PDF document text
    • https://auf.vn/wp-content/plugins/super-forms/uploads/php/files/eo2qllg4gfqbkb9hv87l8f6s36/29938939375.pdfIn PDF document text
    • http://jeanchapleau.com/userfiles/file/17762401773.pdfIn PDF document text
    • https://thefertilizergranulators.com/d/files/69644010334.pdfIn PDF document text
    • https://ipic.vn/userfiles/file/71530524538.pdfIn PDF document text
    • http://perseverance.cyou/updatefiles/file/5192921440.pdfIn PDF document text
    • http://angelascanu.it/uploads/file/noduranewanada.pdfIn PDF document text
    • http://wingprocess.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/rugijixakunutibu.pdfIn PDF document text
    • https://maydongy.com/wp-content/plugins/super-forms/uploads/php/files/m03jbi5gtj86p3g8np4lpa2blf/xexiximemugu.pdfIn PDF document text
    • http://lamgi.pl/ckfinder/userfiles/files/puwut.pdfIn PDF document text
    • https://study-abroad-travel.com/ckfinder/userfiles/file/47625578783.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/DOqCt-cVA4I/uplcv?utm_term=sathya+sai+baba+bhagavad+gita+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_off0000e47c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE47C 19300 bytes
SHA-256: 691ef9fbc03cb26095ef875b250a1feb8556b60fcd6b8df521249541abef7793
font_01_sfnt_off000116b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x116B6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012ecd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12ECD 10668 bytes
SHA-256: 556e162048b907bb898977841a02661158d1674a7eebcbf3c398c3048471bad8