Malicious PDF — malware analysis report

Static analysis result for SHA-256 27f47aff620a80c6…

MALICIOUS

PDF

78.8 KB Created: 2021-04-01 11:41:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: b3c2a0244731c8bc795c780d99239553 SHA-1: 29043f1e2ff29b2c86d860a1fe3d9cae07baf7ea SHA-256: 27f47aff620a80c68dae505e161dd191e96f138ed1b1052dcfb269de9f231739
146 Risk Score

Malware Insights

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

This PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous external URIs pointing to link farms and disposable hosting, suggesting an attempt to redirect users to malicious sites. The document body, though heavily obfuscated, contains metadata related to wkhtmltopdf and a Vizio remote app, likely serving as a lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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 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.
  • QR-code redirect lure medium SE_QR_LURE
    Document instructs the user to scan a QR code with a phone — consistent with QR phishing, but also common in legitimate documents
  • 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=vizio+m260va+remote+app PDF link annotation
    • https://cdn.sqhk.co/jogepirar/pQjh3hh/35431974434.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4488135/normal_6029eafa5f630.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4406216/normal_5fc6b9c9484eb.pdfIn PDF document text
    • https://cdn.sqhk.co/rezeribevi/hjdlhhb/67088288674.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4456391/normal_601db670c3cd9.pdfIn PDF document text
    • https://cdn.sqhk.co/vonirosidejo/3ig2CD2/zed_s_dead_baby_meaning.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4470836/normal_5fc752a5ba0fc.pdfIn PDF document text
    • http://italywow.space/40677445699o3dvz.pdfIn PDF document text
    • http://japebevavagufip.22web.org/difuzuberigitudulixoval.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445115/normal_6032048882889.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387565/normal_604e67877f0da.pdfIn PDF document text
    • http://heleogose.online/xurerovinudezadimigakonedupej.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377924/normal_601be1435a9e2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4493549/normal_60321ff529405.pdfIn PDF document text
    • https://cdn.sqhk.co/suwajipufo/jhfl5l8/motalasolotimano.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/efef6ea9-7770-4e70-b2f8-c21acaae3876/sweat_app_review.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8a956a56-c2cf-4f00-b2c5-01c8f0d0db70/rufedesaxufum.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/622c6fa2-74dd-4943-a9e6-c2820d928bb8/46514759356.pdfIn PDF document text
    • http://jebebubijegew.rf.gd/89595294622.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8e311d44-f734-4098-8754-a8f6428d16d7/sta-rite_e01_error_code.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_off0000f4db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4DB 5256 bytes
SHA-256: 5651088272a95cc102129dcf3d1ccbd25047d7e41cd7df452bd4b012dc4528d2
font_01_sfnt_off000106b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106B7 11076 bytes
SHA-256: 9a2fdfa8d861fbec85382b527517959921217dc5120c8b5f35cc4b97df38f005

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