Malicious PDF — malware analysis report

Static analysis result for SHA-256 2b502a1df9f4173d…

MALICIOUS

PDF

74.4 KB Created: 2021-03-02 10:12:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 5c4cf0261076fa167fc1943f7541db6f SHA-1: 308db653f5fe1a5fe62496895380828ef488e5c0 SHA-256: 2b502a1df9f4173d7b313829d23866297e967f118c6656dc1c2d77f84de5e02e
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous external links, with a critical heuristic indicating a link farm designed to artificially boost SEO. One prominent URL, 'https://fokemale.ru/strik?utm_term=kidde+smoke+alarm+beeping+after+installation', suggests a lure related to a common household issue. ClamAV detection as 'Pdf.Phishing.Trojan' further supports a malicious intent, likely to redirect users to a phishing or malware distribution site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://fokemale.ru/strik?utm_term=kidde+smoke+alarm+beeping+after+installation PDF link annotation
    • http://wozupabalaviv.medianewsonline.com/tosinunasaxegowijepoduw.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415937/normal_5fe7594aa726b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4463560/normal_5ff0922952531.pdfIn PDF document text
    • http://jedomagisuw.getenjoyment.net/zmodo_1080p_outdoor_camera_review.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4421050/normal_5ff7d0a3c0d12.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4408483/normal_5ffdb2caba87c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4370072/normal_5fee9a6f57391.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4502567/normal_6013a9dde4c7e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415748/normal_603ce5115b842.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407756/normal_603928f96fbf5.pdfIn PDF document text
    • http://sixesijilolun.mywebcommunity.org/how_to_remove_grohe_faucet_cartridge.pdfIn PDF document text
    • https://jexetapi.weebly.com/uploads/1/3/4/3/134345775/596977.pdfIn PDF document text
    • https://noloturajikule.weebly.com/uploads/1/3/4/4/134486045/xewolox-katulikudovax-mifovivopuno.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366048/normal_5ff86ed9e11a9.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://xuvekixofeku.onlinewebshop.net/galutatezemubunopiwirero.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://scripts.sil.org/OFLIn PDF document text

Related samples 8

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

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e57a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE57A 5532 bytes
SHA-256: f731a26573022d716b2122218a716ec6d24fd9caddfd537eb6f0d80cd18f8c4a
font_01_sfnt_off0000f831.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF831 10588 bytes
SHA-256: 0a504f895741c64a10f025f2f4419cb293b28c2ff2a8ab32ac547e12a667b561

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