Malicious PDF — malware analysis report

Static analysis result for SHA-256 97feae1f8148aa2d…

MALICIOUS

PDF

89.6 KB Created: 2021-07-03 02:38:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 90e69657287443993e1c6049d4cebc7a SHA-1: 31adfd4bc90d79c2999e73df9d5dace795195c64 SHA-256: 97feae1f8148aa2d75453e60466cf2203fa1b3e8f1d14de80981232ff1b35463
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 a phishing trojan and by an ML classifier with high confidence. It contains numerous links, many pointing to compromised WordPress sites or disposable hosting, suggesting a link farm designed to redirect users to malicious content. The document body is heavily obfuscated and unreadable, but the presence of external URIs and link farm heuristics indicates a likely attempt to lure users to external, potentially malicious, sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9835

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://garglob.ru/uplcv?utm_term=which+is+better+dish+or+directv+yahoo+answers
    • https://veglifekc.org/wp-content/plugins/super-forms/uploads/php/files//firuta.pdf
    • https://venefoil.com/ckfinder/userfiles/files/kaxusan.pdf
    • https://www.mnspineandsport.com/wp-content/plugins/super-forms/uploads/php/files/c11e603a3869bebc9486989662040bc9/87331948309.pdf
    • https://stmarys-perthamboy.com/upload/File/xologekimaroromaripajax.pdf
    • http://akbmodel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f3c0114b6d---19903096275.pdf
    • http://bomtvplus.com/data/board/file/20210522095020.pdf
    • https://otdelkamos.ru/wp-content/plugins/super-forms/uploads/php/files/c0e7f543f02874c2332530a9a1e7d108/14992352748.pdf
    • http://bagpack.com.np/wp-content/plugins/formcraft/file-upload/server/content/files/1607716679c1ac---12902676224.pdf
    • https://aulacvn.com/upload/fck/file/bumozatitafuwag.pdf
    • http://artmetinc.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607eb93ae4a47---19206460287.pdf
    • https://drahmetbostanci.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a3e495b8b9a---xigilomemedujaxelabaxifaj.pdf
    • https://vashadvokat82.ru/wp-content/plugins/super-forms/uploads/php/files/be5dba8f14c94674dc523f9e5c26a7f6/15806214001.pdf
    • https://expungemyrecordnj.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d3ce5865392---tuwujute.pdf
    • http://ecbpolska.pl/wp-content/plugins/super-forms/uploads/php/files/7fe10958d7fbccf77890dd1000f39c13/26986724633.pdf
    • https://ecef-groupe.com/wp-content/plugins/super-forms/uploads/php/files/f9rrml1pcod1157vg3r4lhhjk3/24989995467.pdf
    • http://uat.ideadunes.com/projects/ideadunes-portfolio-site/wp-content/plugins/formcraft/file-upload/server/content/files/1608e435ee165e---54972152862.pdf
    • https://solarconsulting.org/wp-content/plugins/super-forms/uploads/php/files/c8ed11323c69ed8759df2bac4bd97b44/dabobuputavi.pdf
    • https://activepymes.com/pub/file/96905697781.pdf
    • http://www.shipsupply.co.mz/wp-content/plugins/formcraft/file-upload/server/content/files/1606f8cdf312d5---72791864448.pdf
    • https://btcauction.vn/hinhanh/file/31590349035.pdf
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c5e6c82cb41---29281637274.pdf
    • https://www.jahnigterbraak.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160cf41c7e97c5---2855726783.pdf
    • https://cruiseship.cruises/wp-content/plugins/super-forms/uploads/php/files/v7lfht8dmmbn8poidlk0o4u1b2/98900589979.pdf
    • https://www.numberoneporthill.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160bfbc440b2f3---54219577954.pdf
    • http://www.benvenutialmare.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b3aa0556ca1---buzaneg.pdf
    • http://www.medical-psychology.gr/wp-content/plugins/formcraft/file-upload/server/content/files/160d80e14bb4e0---nisazadojusiwufot.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f9ad.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xF9AD 16792 bytes
font_01_sfnt_off000111bf.bin
783f07675be82e7908bea947eaa15ac875860d685e79c9e393b334d0e6599793
pdf-font-stream PDF embedded font (sfnt) at offset 0x111BF 17484 bytes
font_02_sfnt_off00013f93.bin
f260d0815fcd59e24fc0571cf168d2a2133a86775acb620efab86dc5ea4c865b
pdf-font-stream PDF embedded font (sfnt) at offset 0x13F93 10820 bytes