Malicious PDF — malware analysis report

Static analysis result for SHA-256 52ed8b69860f7c5e…

MALICIOUS

PDF

77.6 KB Created: 2021-03-18 14:48:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: d0592b5596ae225f6f468d300d8133e9 SHA-1: 60c0977803841c3de562947c18d39711be1e72a0 SHA-256: 52ed8b69860f7c5e4b48d3bd1550de899b3862c241f4b7da4e2249dc2c7b7f48
186 Risk Score

Malware Insights

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

The PDF contains numerous external links, a common tactic for link farms and phishing lures. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were directly extracted, the PDF structure and embedded URIs suggest it's designed to redirect users to potentially malicious sites, possibly for phishing or to download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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://botokaw.ru/wix?keyword=naruto+cards+price+guide PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4408853/normal_6029f5428a4c2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377391/normal_601cec902bbf6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4457582/normal_603c11b1807c6.pdfIn PDF document text
    • http://kinokaiff.space/lilijelzog2b.pdfIn PDF document text
    • http://libopadu.scienceontheweb.net/vesadim.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418188/normal_6049948478633.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4454575/normal_5ffcfec286a24.pdfIn PDF document text
    • http://recepty-dd.info/60167326795wleie.pdfIn PDF document text
    • http://vostokzapad.su/jaduduvuwoduxamotuniti1x54u.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453906/normal_601be32b412e4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4457838/normal_5fd183f4b23d5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4468551/normal_600e393d7f670.pdfIn PDF document text
    • http://godezigupo.mywebcommunity.org/nanomutalararifuriferar.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4424010/normal_5febebbb57f72.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://d0fd53c2-66a5-49f7-a942-a4bfc50892a3.filesusr.com/ugd/11baf9_e2a3901d8a57432797ebc4648e394326.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/vipinib/christmas_flyer_template_free_word.pdfIn PDF document text
    • https://s3.amazonaws.com/nokiva/29790686408.pdfIn PDF document text
    • https://9e730ba1-499c-413e-9a09-8a81f8121270.filesusr.com/ugd/0a0016_fc0a0f95ad534fbca9337cb79b2836a6.pdf?index=trueIn PDF document text
    • https://7ae52be2-ba3c-41fb-8935-29281088223e.filesusr.com/ugd/affaa6_cac10f1701f5482b82918055f2d427ba.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/zakunafu/why_wont_my_lg_phone_charge.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f0c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0C3 5176 bytes
SHA-256: ce5776ea5ac76841ee8feace11dacdb8972fbd19247e65bd98aa9351f9a19000
font_01_sfnt_off00010275.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10275 11976 bytes
SHA-256: a82f074772097bce63e777efa3eb325279adfa7932178ea4702979094d3c73ba

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