Malicious PDF — malware analysis report

Static analysis result for SHA-256 b22250ed8c9ada14…

MALICIOUS

PDF

96.9 KB Created: 2021-07-15 20:24:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 2f580f649c093d0a190215b2e1f78f52 SHA-1: 450dbeb3355c82aff8bb7d6179c9d6437db9990d SHA-256: b22250ed8c9ada14b1b630238bbe00f790e6492cdc50f4bc617305fd344f8539
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV detecting it as a phishing trojan. It contains numerous links pointing to compromised WordPress upload directories and disposable hosting, suggesting a link farm designed to redirect users to malicious sites. The presence of embedded URLs and the nature of the heuristics indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9920

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://crewmak.ru/uplcv?utm_term=head+shoulder+knees+and+toes+in+spanish+lyrics PDF link annotation
    • https://buddingheights.org/wp-content/plugins/formcraft/file-upload/server/content/files/160b60913e930a---13060547817.pdfIn PDF document text
    • https://e-uchebnici.com/img/file/72348838986.pdfIn PDF document text
    • http://seksdagen.nl/userfiles/file/11685217461.pdfIn PDF document text
    • http://www.platformliften.info/wp-content/plugins/formcraft/file-upload/server/content/files/1607f7a3b6de64---30452885818.pdfIn PDF document text
    • https://alfa-pechati.ru/wp-content/plugins/super-forms/uploads/php/files/440286d0af8ae814e13b70bdbd09a55b/tolotuwetujazonejujep.pdfIn PDF document text
    • https://divorcioconsensual.com.br/wp-content/plugins/super-forms/uploads/php/files/4aae9042be5d9227fcf2b3da1d8d2e0f/rezijiruxiwazafi.pdfIn PDF document text
    • https://perleyparish.org/wp-content/plugins/super-forms/uploads/php/files/f334fa1c926ded16ca5482bd8374cb76/98103049618.pdfIn PDF document text
    • https://harpethvalleyhealth.com/wp-content/plugins/super-forms/uploads/php/files/d773c1889ae65abc6edf0c444091f449/silejekogiporegovididan.pdfIn PDF document text
    • https://lostsoulsmemorialnj.org/wp-content/plugins/super-forms/uploads/php/files/b81c3b30351f625260e51bd1a49414ad/8903278141.pdfIn PDF document text
    • https://sv-fin.ru/wp-content/plugins/super-forms/uploads/php/files/bdf13100bdd3411372b304f757dcff88/56040764168.pdfIn PDF document text
    • http://constructionone.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16086ca092d653---gobufefivarevazomove.pdfIn PDF document text
    • https://intelean.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608f82586ed9f---74335536094.pdfIn PDF document text
    • http://paroissedementon.fr/upload/files/xijuruzaleroval.pdfIn PDF document text
    • http://lifestyleufa.ru/wp-content/plugins/super-forms/uploads/php/files/b83fc6deecbadcc1d14a8a618c81792a/kewudekidepokipojoveb.pdfIn PDF document text
    • https://alarouba.com/ckfinder/userfiles/files/xivimokalijofonizojo.pdfIn PDF document text
    • https://stellabakingcompany.com/wp-content/plugins/formcraft/file-upload/server/content/files/160796c06eab67---7367349327.pdfIn PDF document text
    • https://toromecanicorodeo.com/files/94733623482.pdfIn PDF document text
    • http://canxetaidientu.com/images/file/75283007334.pdfIn PDF document text
    • http://bfr-bialapodlaska.pl/userfiles/file/48195999470.pdfIn PDF document text
    • http://agiusfuneraldirectors.com/files/file/puzozozaluxu.pdfIn PDF document text
    • http://jmvlpslimited.com/ci/userfiles/files/fodidarid.pdfIn PDF document text
    • https://pacantioquia.org/aym_image/files/93437075462.pdfIn PDF document text
    • https://engravestone.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d943dcf4e6---39367222655.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fbdb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBDB 18840 bytes
SHA-256: df55f44b3d9bc78779f0fe85ea1436d666865a122e512bc1febe5c90223fb6a5
font_01_sfnt_off00012c1c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12C1C 10908 bytes
SHA-256: 5305aed6e8fd2961d203e213f99a85883ea861753d33b185d0556bc0c258e7d9
font_02_sfnt_off0001454b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1454B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_03_sfnt_off00015d5c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15D5C 16460 bytes
SHA-256: 128991f5c1439f1e60f0d9765295b5ad66d1b063a9a2765b31b3552cb36eea64

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