Malicious PDF — malware analysis report

Static analysis result for SHA-256 e27034b85d1e250e…

MALICIOUS

PDF

67.7 KB Created: 2021-03-02 21:42:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 1fcb67d007cdc90e83f4cbfa8fc49a1c SHA-1: 39463e0878962477d58f5547f4d3027ad9c4ff1b SHA-256: e27034b85d1e250e8d6156b8b38dcabb47cf09edca191d1525cface5e55de4d1
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://lozipotod.ru/strik?utm_term=ge+spacemaker+microwave+over+the+range+installation PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4402504/normal_6013bffed5766.pdfIn PDF document text
    • http://alifan.store/bibusawimumumedusebibom8pzxs.pdfIn PDF document text
    • http://zonixutazexe.iblogger.org/ritukutop.pdfIn PDF document text
    • http://compte-cmbretagne.best/android_adb_chmod_operation_not_permittedc1oki.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4445114/normal_5ffbc0f1094ea.pdfIn PDF document text
    • http://bedomukuruxe.22web.org/classification_of_organisms.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4449399/normal_5fe1d380a6d41.pdfIn PDF document text
    • http://sayseedokg.com/jeopardy_game_template_with_musicv2084.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402721/normal_6024302a6bc85.pdfIn PDF document text
    • http://igonlinesupport.com/8957240705350dfe.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/fidobakipivogit/mevinobikasugifaziwomeveb.pdfIn PDF document text
    • https://s3.amazonaws.com/savifin/muxijujumosep.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_off0000ca33.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA33 5596 bytes
SHA-256: 911422e82813d05fea600fe634c5cec72fc6bc92c992b8a8171674811c757d4e
font_01_sfnt_off0000dd30.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD30 10808 bytes
SHA-256: d6f594ebbe6e493f4b015a4512b94d5fb6b2258bf2c7514afc4fb7ce28298a68

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