Malicious PDF — malware analysis report

Static analysis result for SHA-256 a75192d3b98788fb…

MALICIOUS

PDF

93.5 KB Created: 2021-09-02 14:15:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: e92b399f485b78b603ff046521d49029 SHA-1: 9cacedb3c48286835e01b04d19f40b352a8bfc6a SHA-256: a75192d3b98788fb14bb3d68943c35c4c99223a2d60b5e6cb9a68b13e580acf3
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. Heuristics reveal it functions as a link farm, directing users to multiple compromised WordPress sites and disposable hosting domains. The embedded URLs suggest the primary goal is to redirect users to external malicious content, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9968

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://pixomot.ru/uplcv?utm_term=diamond+cutter+sutra+pdf
    • http://profitoolinfo.ru/ckfinder/userfiles/files/96864431254.pdf
    • https://thehamptonsbloomington.com/wp-content/plugins/formcraft/file-upload/server/content/files/16085f2c31bdb0---61612025504.pdf
    • http://casier-a-bouteilles.com/file/49166120059.pdf
    • http://www.euro-fly.eu/userfiles/files/14214250816.pdf
    • http://jhroseclassof77.com/clients/45984/File/vojusobifareninaku.pdf
    • https://leunamgroup.com/wp-content/plugins/super-forms/uploads/php/files/4dfb4c75848ee2053a326cf348222d2e/49182697891.pdf
    • https://gpagroup.in/wp-content/plugins/formcraft/file-upload/server/content/files/1609273e6b1f46---ruwulin.pdf
    • http://hoadon-dientu.net/images/files/95167875008.pdf
    • http://aliancegroup.su/wp-content/plugins/formcraft/file-upload/server/content/files/16092e9cbed18b---63802841791.pdf
    • https://detectiveoffice.net/userfiles/file/5692697284.pdf
    • http://terapie-psi.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160a100b3ceb26---2339222926.pdf
    • http://change4best.ru/upload/file/kokukaxuvedabalofiwiri.pdf
    • http://eviljoy.com/UserFiles/File/devusurije.pdf
    • https://adiwirawanbali.com/wp-content/plugins/super-forms/uploads/php/files/422217fb12f899593098fbce1d5e81be/nadaramelovabifum.pdf
    • https://agrotehholding.ru/wp-content/plugins/super-forms/uploads/php/files/2bdb41d4a02c76380919a6222a1d67fa/61026628244.pdf
    • https://orig-shop-gsm.ro/ckfinder/userfiles/files/sakowituvibadov.pdf
    • https://miamiuniquelimo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160dfea8aee7de---zazajunapidorogun.pdf
    • https://wscnaturalhealings.com/wp-content/plugins/super-forms/uploads/php/files/7de6858040fb8b17dcbf33ddd98c8d36/bedekutegu.pdf
    • http://udaybharat.in/ckfinder/userfiles/files/badodomixufaxatewosata.pdf
    • http://webatnet.de/ckfinder/userfiles/files/jitun.pdf
    • https://www.taxikladis.gr/wp-content/plugins/formcraft/file-upload/server/content/files/160bdb8ed97c9a---vakejasaligojokadufibir.pdf
    • http://www.hptindia.com/wp-content/plugins/formcraft/file-upload/server/content/files/16080acce78809---radog.pdf
    • https://alperbehang.nl/userfiles/file/14312014188.pdf
    • http://oneself.pro/wp-content/plugins/formcraft/file-upload/server/content/files/1609485f7797e1---razutitulaxuwabe.pdf
    • http://kioskcondoweb.wpengine.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f01b323baf7---difebopulabej.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_off0000ff8a.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xFF8A 16792 bytes
font_01_sfnt_off0001179c.bin
f4c889484925a71d25398eb482a0a874c4829988e2935ea394d2bf58a48b123b
pdf-font-stream PDF embedded font (sfnt) at offset 0x1179C 21916 bytes
font_02_sfnt_off00014f55.bin
a36144d4060f51a73ff476a4d73d9a8caa9b9d6f4ac563dc209552f8c8911df6
pdf-font-stream PDF embedded font (sfnt) at offset 0x14F55 10836 bytes