Malicious PDF — malware analysis report

Static analysis result for SHA-256 fa0ff1770e02f0a9…

MALICIOUS

PDF

79.1 KB Created: 2020-11-14 07:09:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-23
MD5: a120c3f7207c0c2a225428bdf2d4ae98 SHA-1: 88b8857be01771be922650af1a21b550777f03c4 SHA-256: fa0ff1770e02f0a987c81ba9ea5c6caa912e34a9ba7bca5464bf8facdec3780c
154 Risk Score

Malware Insights

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

The PDF file contains a link to a known malicious redirector infrastructure, which is disguised with text suggesting a free download of 'Mcpe 14.0 apk'. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. No scripts were extracted, but the embedded URL is the primary indicator of compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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=mcpe+14.0+apk+free+download In PDF document text
    • https://cdn-cms.f-static.net/uploads/4409103/normal_5f994f7e9bfbf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4456387/normal_5fa5684a4c81d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381108/normal_5f8d3df7495ca.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/e3e6045b-c201-4b7b-a273-8ecb192f463e/corpse_bride_vs_nightmare_before_christmas.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2c83f291-f1b2-4e6f-ba7f-f9c5fb82eb84/xurijesi.pdfIn PDF document text
    • https://s3.amazonaws.com/bizamesuwepe/50749327032.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7520eaed-566c-4098-85d1-e373c3ca24a5/the_crucible_act_1_worksheet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7ee28e14-9ca5-4630-85d4-3e3d8b5dee5d/mac_cosmetics_wiki.pdfIn PDF document text
    • https://s3.amazonaws.com/tugumeb/chain_rule_problems_in_aptitude.pdfIn PDF document text
    • https://s3.amazonaws.com/woberiz/89415939756.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4a67eeff-9694-423b-9b85-e952107499aa/joruxijopiworogaluximusov.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3b366cb8-f9e8-4bbe-ad41-70b80e652878/dolozejunow.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
stream_004_off0000f10a.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0xF10A 7412 bytes
SHA-256: 73df2820aaa3d2e1d089d4ad8d9ebab035254ebe4d03245bcaf49c4f762c5104
font_00_sfnt_off0000de42.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE42 5444 bytes
SHA-256: 43aebd12d53883c1ca42cdfe8dde16ebe6529cf96a423248dbbebfcaf132e6f5
font_02_sfnt_off00010aa0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10AA0 10720 bytes
SHA-256: 17f3ebb6880544de00821dc31ce95cf4f8434bdd81850706d55012cf477e87c5

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