Malicious PDF — malware analysis report

Static analysis result for SHA-256 92caa4ab4d36e53e…

MALICIOUS

PDF

80.4 KB Created: 2020-12-13 12:53:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 42c0236ec65ef3d2c0fde6f420105cbe SHA-1: 92b6854daefd1658de478817e682675aa19f0429 SHA-256: 92caa4ab4d36e53e95b2edf06f427e4f95669b96ddf89b0b3db3c1af1087142a
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a link to a known malicious redirector, indicating an attempt to phish or deliver malware. The ML classifier and ClamAV detection strongly support this assessment. Although no scripts were extracted, the embedded URL is the primary indicator of malicious intent, likely serving as a lure for a phishing or malware delivery campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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://cctraff.ru/123?utm_term=giro+d%2527italia+live+stream+tiz In PDF document text
    • https://cdn-cms.f-static.net/uploads/4371808/normal_5f9a91afbadd2.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fc522e660f2895dc10348e3/t/5fc86fbae21c7c679ae3d1c1/1606971323741/77298612545.pdfIn PDF document text
    • https://s3.amazonaws.com/paxivogedewilu/sipavijijezajo.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc36f132e537a05ef193780/t/5fcd18346f0099009e69cd7a/1607276596242/14479569628.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc296815e8e827d4298a2f8/t/5fcd950133187724c40b7ca7/1607308548754/senior_captions_for_instagram_2020.pdfIn PDF document text
    • https://s3.amazonaws.com/pegek/lawedipabaloromok.pdfIn PDF document text
    • https://s3.amazonaws.com/jiwisi/lil_boosie_net_worth_2020.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/521b5274-2a62-402b-bf3d-84f7bcdd3f22/merarikizemudirezosilure.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dba7ceea-a3e5-40e2-a455-38afcce200e8/zovidufabenuzegox.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbe3865e6d49a06bb5c86fe/1606301798268/estrategica_de_marketing.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0cc948139af037644bbed/t/5fc220fc3c6ccf69f3a64c1c/1606557948750/kogufafisige.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_off0000ff96.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF96 5144 bytes
SHA-256: e3015888769de212ddfdf29a329813408c17d8518542a7c5d8c09adbce2f7725
font_01_sfnt_off00011117.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11117 10976 bytes
SHA-256: 0d0504b26abe4a41a1a48f16bbc1ad9b7de500ec9c4f0df65921dac8d8115f5c

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