Malicious PDF — malware analysis report

Static analysis result for SHA-256 fa6e2455248d0efa…

MALICIOUS

PDF

98.9 KB Created: 2021-07-30 08:53:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-15
MD5: 9d8db8ff1e212ec9c2d12ccefbe377ea SHA-1: a54f7fd46064d091bc6f3b228c2f0e98e2aa20aa SHA-256: fa6e2455248d0efaea267022c2de96e0b3b9c91a214385572085a95f5424400b
172 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The sample was identified as malicious by a ML classifier and ClamAV, with heuristics indicating it contains embedded JavaScript and a link farm. The presence of a 'Fake invoice / payment lure' heuristic, combined with numerous URLs pointing to PDF files on various domains, suggests a phishing attempt to trick users into downloading further malicious content. The embedded JavaScript likely facilitates the execution of malicious actions or redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

Heuristics 8

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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://www.poolsrus.com.au/application/third_party/ckfinder/userfiles/files/91412729982.pdf In PDF document text
    • http://adance0112.com/upfile/editor/file/gidazelafapoletoguxobuxa.pdfIn PDF document text
    • http://galgalesh.com/userfiles/file/63568315442.pdfIn PDF document text
    • http://boulderdivorcelaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608df895dd0f0---rizajutuv.pdfIn PDF document text
    • https://www.areatransfers.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b2de99b3fd---92043623323.pdfIn PDF document text
    • https://wickedcheesy.com/images/file/nerovufamidejapagilimo.pdfIn PDF document text
    • https://www.web2business.pt/wp-content/plugins/formcraft/file-upload/server/content/files/16095e331581b8---peseladewobubikawezuxura.pdfIn PDF document text
    • https://fjordancv.info/wp-content/plugins/super-forms/uploads/php/files/55227326060da11a26d4a948bc8e3e72/bapodula.pdfIn PDF document text
    • http://themultifold.com/wp-content/plugins/super-forms/uploads/php/files/5qrits4qelhgmac4qe2r69ufr3/vexekiramavubejuk.pdfIn PDF document text
    • http://mim2010.ru/userfiles/file/36511090478.pdfIn PDF document text
    • https://growlocals.com/wp-content/plugins/super-forms/uploads/php/files/859cd74f0163074d471cb648b3a21921/selalufemixarus.pdfIn PDF document text
    • https://christembassybarking.org/wp-content/plugins/super-forms/uploads/php/files/70450ba66d58b8efca483734dcb075d6/xezemesob.pdfIn PDF document text
    • http://extracam.es/app/webroot/arxius/file/roxodum.pdfIn PDF document text
    • https://fieldofgreen.com/wp-content/plugins/super-forms/uploads/php/files/e57b9d6572c63c6e1351d87f281ed673/49346232796.pdfIn PDF document text
    • http://exactblue.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cadeacef6b3---22810289569.pdfIn PDF document text
    • http://digitalqwerty.com/ckfinder/userfiles/files/jolugeridi.pdfIn PDF document text
    • http://kxnjl.com/userfiles/files/kigizefuf.pdfIn PDF document text
    • http://kazenergy.kz/wp-content/plugins/formcraft/file-upload/server/content/files/1606c8b46e818e---gopidawuzatev.pdfIn PDF document text
    • http://paintmaster.hu/js/ckfinder/userfiles/files/tetowavanunefel.pdfIn PDF document text
    • http://billedbutikken.dk/articlefiles/file/63950010960.pdfIn PDF document text
    • https://utilitydiscount.com/wp-content/plugins/formcraft/file-upload/server/content/files/16081ac27362f0---53150248371.pdfIn PDF document text
    • https://www.aceitedeoliva.com/wp-content/plugins/super-forms/uploads/php/files/277d3c1413cf686e74e2d8970425a0d1/76492976784.pdfIn PDF document text
    • https://chmelo.hu/sites/default/files/file/32209276235.pdfIn PDF document text
    • http://siripanyalamphun.com/user_img/files/xegujizukuz.pdfIn PDF document text
    • http://postelezmasivu-brno.com/ckfinder/userfiles/files/mezibigopijoriride.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BkSY9tpko7c/uplcv?utm_term=solucionario+libro+matem%C3%A1ticas+5+primaria+santillana+saber+hacerPDF 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_off00011b9e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B9E 11268 bytes
SHA-256: 336844fc6cdae000ba38919127e10928d50398f95590f2df5783bd79de7149ec
font_01_sfnt_off00013549.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13549 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00014d5b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14D5B 18072 bytes
SHA-256: b607279f95afe3ccbe483ee5a6cc44503ef515f89e0ddc16179d77b5d7a1875e

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