Malicious PDF — malware analysis report

Static analysis result for SHA-256 abc282ed631ad88d…

MALICIOUS

PDF

75.6 KB Created: 2021-01-19 08:59:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 2b2dfdc883e863ca0c6d11884df7337e SHA-1: be642aaab4e7a07a73cecf833862ea6dd0c989c2 SHA-256: abc282ed631ad88d951d2d129e58f4c7ac52ce2a17fe2568196a9eaf2a9fda1c
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. The document body, though heavily obfuscated, contains references to a Minecraft guide, likely a lure to direct users to the external URL https://traffking.ru/123. This URL is part of a link farm hosted on disposable domains, a common tactic for phishing and malware distribution. No scripts were extracted, but the PDF structure and embedded URLs strongly suggest a phishing or credential harvesting attempt.

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 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://traffking.ru/123?utm_term=how+to+make+chainmail+armor+minecraft+1.16 PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4411919/normal_5fdc0450560ca.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4482860/normal_5fb6acbd72465.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454813/normal_5fbf6aea4ac19.pdfIn PDF document text
    • https://devuxitimon.weebly.com/uploads/1/3/4/5/134596282/miwajubaw-vebakewazoweko.pdfIn PDF document text
    • https://mivegogoke.weebly.com/uploads/1/3/4/3/134365655/rikisibosijakuvo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417808/normal_5fd95d1309e1b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373997/normal_5f8e52f2cb8e1.pdfIn PDF document text
    • https://cdn.sqhk.co/tubadaluzafu/jhVjeWi/39403398813.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407060/normal_5fdbc0271079d.pdfIn PDF document text
    • https://cdn.sqhk.co/masamiwe/jijzHhb/ruvuzifefet.pdfIn PDF document text
    • https://mesipaku.weebly.com/uploads/1/3/1/3/131383407/426f5159d48011d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4375507/normal_5ff3f9e6d4b55.pdfIn PDF document text
    • https://lavupujewefi.weebly.com/uploads/1/3/4/6/134631736/gaxeju_lopir_sorilepapis.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376629/normal_5f93948b7170d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4416143/normal_5fc6f1208361e.pdfIn PDF document text
    • https://fapadeli.weebly.com/uploads/1/3/4/4/134445247/wufili.pdfIn PDF document text
    • https://cdn.sqhk.co/loxowopiv/jcgi9ij/40831254283.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/liguwubore/84691915702.pdfIn PDF document text
    • https://s3.amazonaws.com/sajatesawodiji/3d_typography_photoshop_templates.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000de2a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE2A 5088 bytes
SHA-256: a3248c9437ae99053bde0b03dfa91d770f93d3b186f3ad73e3a87df57ec7506d
font_01_sfnt_off0000ef5d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF5D 10392 bytes
SHA-256: a70a2f6f3a10e96e042d8e4986b34741a19e77fea815aa8e4554ad50fbac5cf9
font_02_sfnt_off00011309.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11309 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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