Malicious PDF — malware analysis report

Static analysis result for SHA-256 24a22e43440b9c74…

MALICIOUS

PDF

166.9 KB Created: 2021-07-04 20:58:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 059c4ed81739d66d1b45269ae8136df2 SHA-1: 8cdee34baf80d48c3579e92a9bfef1d4f7e22fa1 SHA-256: 24a22e43440b9c74bd79c277f226a9280db45380acd9a54dde85a35b07c9ef48
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing or trojan. The heuristics indicate it functions as a link farm, directing users to various compromised WordPress sites and disposable hosting domains. The 'SE_CALLBACK_LURE' heuristic strongly suggests the document's purpose is to trick the user into calling a phone number, a common tactic in callback phishing and tech-support scams.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9913

Heuristics 7

  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) or Microsoft license-boilerplate documents that carry no urgency or charge/dispute escalation.
  • 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://synerhu.ru/uplcv?utm_term=molting+in+humans PDF link annotation
    • https://wholisticvibrations.com/wp-content/plugins/super-forms/uploads/php/files/831ab853ec9d327651afcca541de12b7/telegolufixininewutolegu.pdfIn PDF document text
    • https://naseeha.org/wp-content/plugins/super-forms/uploads/php/files/2743971972ac7d63216fbd4b880aabe3/92862249034.pdfIn PDF document text
    • https://inclinedigital.com/wp-content/plugins/formcraft/file-upload/server/content/files/16086e0de91791---foxusino.pdfIn PDF document text
    • https://amrapalispot.com/userfiles/file/redeloforibujararedor.pdfIn PDF document text
    • http://anhuizpyy.com/upload_fck/file/2021-5-2/20210502073523500531.pdfIn PDF document text
    • http://bridgesonthepark.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608cd32c229ec---50613206819.pdfIn PDF document text
    • https://yziact.fr/wp-content/plugins/super-forms/uploads/php/files/pjce8aa5582daa2gql1eq9gvhe/fepixapewogaguzeje.pdfIn PDF document text
    • http://xperion.hu/wp-content/plugins/super-forms/uploads/php/files/bbe2593e303e4656dbb899d1e3d8c3aa/57798656795.pdfIn PDF document text
    • https://utilitydiscount.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608a013dca24b---zisojulexojuribabo.pdfIn PDF document text
    • http://jkbprivateiti.com/userfiles/file/zazapudufikum.pdfIn PDF document text
    • http://ridendo.cz/files/file/87633470241.pdfIn PDF document text
    • https://transcendenceit.com/wp-content/plugins/super-forms/uploads/php/files/dee9154dc154f964a0ec1349f4189890/xuvumejejozeker.pdfIn PDF document text
    • https://www.litesourcenc.com/wp-content/plugins/super-forms/uploads/php/files/96bbe480adffcc24b7112261e30bb079/ranixekipapiruvav.pdfIn PDF document text
    • https://www.sussexweddingservices.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160c16eb3793ae---gipugoluxogaro.pdfIn PDF document text
    • http://www.iycadana.org/wp-content/plugins/super-forms/uploads/php/files/81n8psh6cktrvva3f9r50g0ji0/goturofajaxudefelonamali.pdfIn PDF document text
    • http://moveisgarciadigital.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160b9a7a9aabb7---60893585685.pdfIn PDF document text
    • https://www.amiunaorchestra.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16077666b94bbb---gotexegotij.pdfIn PDF document text
    • http://remontnoedelo.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1609d0faa24325---15950431688.pdfIn PDF document text
    • https://master.plus/wp-content/plugins/super-forms/uploads/php/files/b5a2af7aa964ba89645d030d8fda80b1/zawapiviwilabevinoredina.pdfIn PDF document text
    • http://mgocsm.in/userfiles/file/guwamoliketapewa.pdfIn PDF document text
    • http://work4shop.cz/userfiles/file/rupujumadu.pdfIn PDF document text
    • https://playgametoday.ru/wp-content/plugins/super-forms/uploads/php/files/3d4c0310a43992c90f5da3b7da1a1661/78959015465.pdfIn PDF document text
    • http://www.grupohk.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a81f495ec76---47103699272.pdfIn PDF document text
    • 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_off00022c56.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x22C56 10416 bytes
SHA-256: 6568bbee80fc914268b1e9d12663551845c3f2d4521073ddf07aa11c86ffec54
font_01_sfnt_off000243bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x243BB 18920 bytes
SHA-256: c5e88cf3c81d70741164f8284f46ae80c0d557f4bbcc80ff5963a6f74d27b9c8
font_02_sfnt_off00027667.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x27667 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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