Malicious PDF — malware analysis report

Static analysis result for SHA-256 89c2cb5d509f5e3c…

MALICIOUS

PDF

65.9 KB Created: 2020-12-25 03:44:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 6ac701b2166672366012bf31629a6b51 SHA-1: 9599c0d4e632fab2cf3adb0791d42ad46688d5ba SHA-256: 89c2cb5d509f5e3c3b4bec3497288e30ec04e35fabf94f7604fcdae170f3a0f8
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains numerous external links, many of which are part of a link farm designed to direct users to potentially malicious websites. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or a scam, as suggested by the lure text 'micro trip mod apk'. Although no scripts were explicitly extracted, the PDF structure and heuristic firings point towards the exploitation of PDF vulnerabilities or social engineering to redirect users.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://trafftec.ru/strik?utm_term=micro+trip+mod+apk PDF link annotation
    • https://sexozorojupur.weebly.com/uploads/1/3/4/3/134390270/vogeronuzu_bujaka.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368469/normal_5fda48c0576be.pdfIn PDF document text
    • https://tanoviruxejalun.weebly.com/uploads/1/3/0/7/130775892/3744564.pdfIn PDF document text
    • https://roxuvipiga.weebly.com/uploads/1/3/4/6/134637137/musefuralagix-mizojo-nozumaxuzatezer-webuworud.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4401519/normal_5f91ca1f1b675.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/wuwabobujasivor/homonyms_word_search_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/rufonali/alkaline_forming_foods.pdfIn PDF document text
    • https://s3.amazonaws.com/zufojadibi/evolution_2_battle_for_utopia_cheats.pdfIn PDF document text
    • https://s3.amazonaws.com/nezanurugega/starry_night_mamamoo_album.pdfIn PDF document text
    • https://s3.amazonaws.com/zirojopemup/siferaxex.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_off0000bcfd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBCFD 5076 bytes
SHA-256: 2a5936595d4421089dd6f8bf79a6b2bbbc4e8150e70b51e63ce51c367398d5ea
font_01_sfnt_off0000ce39.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE39 14324 bytes
SHA-256: b96ceda614d2315d45c4e2f59c3502ead0965589cc6ced935f998731e3f7d24d

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