Malicious PDF — malware analysis report

Static analysis result for SHA-256 92d197f1af155bf1…

MALICIOUS

PDF

82.5 KB Created: 2021-06-28 19:43:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: af6a054fda921504a74023e6cb3765b3 SHA-1: 698079fba80ef7972a20e0765c680fa1c241a99e SHA-256: 92d197f1af155bf180bcf01c8968f8933831007500bf218a3c32bf92b4ff1476
156 Risk Score

Malware Insights

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

The ML classifier and ClamAV detection strongly indicate malicious intent. The PDF contains numerous links pointing to compromised WordPress uploads and disposable hosting, suggesting a link farm designed to redirect users to malicious sites. The presence of external URIs and link farm heuristics points towards a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9972

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://vds-construct.pl/userfiles/file/pojeje.pdf In PDF document text
    • http://oneself.pro/wp-content/plugins/formcraft/file-upload/server/content/files/160a13e96851a9---47867437331.pdfIn PDF document text
    • http://thefutureofgolf.eu/wp-content/plugins/formcraft/file-upload/server/content/files/1608d075ae3fb6---lupegetugiwaredubisadi.pdfIn PDF document text
    • http://www.gainerwindows.ca/wp-content/plugins/super-forms/uploads/php/files/kn438jtmhechuuf8db9580r2p0/72622716442.pdfIn PDF document text
    • http://www.mywil.ch/wp-content/plugins/formcraft/file-upload/server/content/files/160b170575c285---24333582331.pdfIn PDF document text
    • https://alutat.com/data/file/56675391269.pdfIn PDF document text
    • http://www.ncstarim.com.tr/wp-content/plugins/super-forms/uploads/php/files/71bghv2arubh8pigkmq077ukl5/67662669810.pdfIn PDF document text
    • http://ccswcd.com/userfiles/file/wiraturak.pdfIn PDF document text
    • https://www.hit-education.com/wp-content/plugins/super-forms/uploads/php/files/a47ljbl07e9ll5fn7p1sb7ao1h/genupelerimamemi.pdfIn PDF document text
    • https://whitelightdesign.com/wp-content/plugins/super-forms/uploads/php/files/659646ec4a9482503ed45c66829201f7/tenidanunodexaxifaxi.pdfIn PDF document text
    • https://mosoptagro.ru/wp-content/plugins/super-forms/uploads/php/files/ce2dea0dc1e4761a2f0ffee1c2bdb003/45538947860.pdfIn PDF document text
    • https://www.lumisolar.pe/wp-content/plugins/formcraft/file-upload/server/content/files/1608d3aeea2171---48550364252.pdfIn PDF document text
    • https://bilalyapidekorasyon.com/userfiles/file/wewitiwositorigeg.pdfIn PDF document text
    • https://fisheaglesafaris.net/pics/user/file/18084789341.pdfIn PDF document text
    • https://tavcam.com/upload/ckfinder/files/14823586118.pdfIn PDF document text
    • http://motelandratecuci.ro/userfiles/file/80360219771.pdfIn PDF document text
    • https://tripleccompanies.com/wp-content/plugins/super-forms/uploads/php/files/88176fd13f26c8a029740dd776a05611/32453606577.pdfIn PDF document text
    • https://vmkstroi.ru/wp-content/plugins/super-forms/uploads/php/files/bc9ff797a06233f69003a7c5ed099748/votetewomulukerebop.pdfIn PDF document text
    • http://webinaris.biz/ckfinder/userfiles/publics/files/14689299388.pdfIn PDF document text
    • https://bizdrive.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1/160aa5c3cb555c---nifurutorapisedisuf.pdfIn PDF document text
    • http://clair-environnement.eu/catalogue_dynamique/file/jixetipigujubadofe.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/fzgW7-mxBc0/uplcv?utm_term=after+breast+biopsyPDF 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e262.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE262 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000fa74.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA74 16272 bytes
SHA-256: eedfb73981a00f97cd80c984662033f71d51c9aa326ae2897eab48086c5221fa
font_02_sfnt_off0001243b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1243B 10436 bytes
SHA-256: 56bcd0670da54dc661d395627abc783657ec84f6df0762ac9a96cf230ec862c9

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