Malicious PDF — malware analysis report

Static analysis result for SHA-256 0e19d156111db699…

MALICIOUS

PDF

74.8 KB Created: 2021-06-30 00:54:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 6348b609d79a1508e7e93f5f03fe9330 SHA-1: c3f2458c27a6ba89edb7eb6b97ad1965c6cda2da SHA-256: 0e19d156111db69963030b50548b0d2b8acbf097390749d20bfc1f64dfb309b7
156 Risk Score

Malware Insights

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

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous links pointing to compromised websites and disposable hosting, suggesting a link farm designed to redirect users. The PDF structure and embedded links are consistent with phishing or malware distribution campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9963

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://markzone.az/wp-content/plugins/super-forms/uploads/php/files/g1o78boklenkr45ivq6can1169/bopodojapotebomiwaxik.pdf
    • https://tkquiz.com/userfiles/file/xoviwetutiwezedurikatosi.pdf
    • http://www.jindatunnel.com/up_files/file/mamagorefu.pdf
    • http://physiotherapy-warwickshire.com/user_file/file/19568715150.pdf
    • http://saludocupacionalpso.com/home/wp-content/plugins/formcraft/file-upload/server/content/files/16083bb8583a2e---75041174183.pdf
    • http://exactblue.com/wp-content/plugins/formcraft/file-upload/server/content/files/160706f5a773b2---zafagofimezesud.pdf
    • https://mk-promotions.com/ckfinder/userfiles/files/17236495201.pdf
    • http://hodinovysoused.cz/upload/file/lurediratifevakebelepi.pdf
    • http://www.icodar.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ceb5b95305---91839203470.pdf
    • http://nedirajtebosnu.net/userfiles/file/morejanipovobi.pdf
    • https://accesoriosalmayor.com/images/userfiles/file/22563871170.pdf
    • https://cbolean.com/wp-content/plugins/super-forms/uploads/php/files/2mop28sqmcj4lums424e2ac1e4/winokuvesugadodus.pdf
    • https://cicadit.ro/UserFiles/file/lekesug.pdf
    • http://worksafeorg.com/wp-content/plugins/super-forms/uploads/php/files/30m3ui9kcn3eruflvmrksirqk5/41422339202.pdf
    • https://ailani.org/wp-content/plugins/super-forms/uploads/php/files/872fe36e82c51df23f7f0b55e68826dc/5382709044.pdf
    • http://skolicka.eu/foto/images/file/82743610951.pdf
    • http://sacmacbook.net/userfiles/file/36165790990.pdf
    • https://studiorampinelli.com/file/bonitolezizi.pdf
    • https://mecaniquekd.ca/upload/file/19724841969.pdf
    • https://ahi.com.ua/wp-content/plugins/super-forms/uploads/php/files/8e6b5e2c757aeeb7b38538728d140ef3/likudoxasufuwuzizutojas.pdf
    • https://djhelaly.com/wp-content/plugins/super-forms/uploads/php/files/4033f23d30e3bf9090f322e75023546d/kolodalumuvutimot.pdf
    • http://aliancegroup.su/wp-content/plugins/formcraft/file-upload/server/content/files/1608266ecb133e---28364267669.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/Om9ozkHLxGw/uplcv?utm_term=satish+chandra+medieval+india+old+ncert+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_off0000c229.bin
a8ea86c923a71c676e4c72fe44ae0544687842180736934c33e0aeefd9df5d3d
pdf-font-stream PDF embedded font (sfnt) at offset 0xC229 16460 bytes
font_01_sfnt_off0000ec93.bin
a13a252331e25e9989107cdf40358d56ac35e4e969a21da4e7b2aec816e4389a
pdf-font-stream PDF embedded font (sfnt) at offset 0xEC93 11024 bytes
font_02_sfnt_off00010600.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x10600 16792 bytes