Malicious PDF — malware analysis report

Static analysis result for SHA-256 2c7515c5670641fa…

MALICIOUS

PDF

70.6 KB Created: 2020-12-20 12:10:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: 7988946750af8c61229154e471a2fdb9 SHA-1: 76e65ce25c2551f6638ac1e992dd9b58fd9f57c8 SHA-256: 2c7515c5670641fa23a5742f91995670a17f43b0d11e70618c2798b32bfd7a27
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, with the primary malicious URL being trafffi.ru. The ClamAV detection and ML classifier strongly indicate malicious intent, specifically identified as a phishing trojan. While no scripts were directly extracted, the PDF structure and embedded links suggest it's designed to redirect users to malicious content, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://trafffi.ru/123?utm_term=ego+eimi+in+matthew PDF link annotation
    • https://vefawotujetebab.weebly.com/uploads/1/3/4/6/134651081/13b2903e5dc80f8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377924/normal_5f931a5732062.pdfIn PDF document text
    • https://fupigipefixoxom.weebly.com/uploads/1/3/1/3/131379213/40f78.pdfIn PDF document text
    • https://fesoviso.weebly.com/uploads/1/3/4/7/134710514/b581957c4311.pdfIn PDF document text
    • https://xurigaguk.weebly.com/uploads/1/3/4/6/134635426/zaximiruwa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407552/normal_5f980ce5cdbcf.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/8f046335-18e7-4f5d-a345-1c195950a20c/puzexoderipumurej.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e14e2bd1-f235-4145-9145-7b6a90baf4af/multithreading_in_java_lab_exercises.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/eda22023-aa90-4c7a-866d-121400fdf9c9/dream_league_16_apk_download.pdfIn PDF document text
    • https://s3.amazonaws.com/neviwove/33400231109.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e5bccd39-7e51-4f5b-9415-0b13dd5ee0fa/black_ops_4_death_of_orion.pdfIn PDF document text
    • https://s3.amazonaws.com/wogikokuzotaxa/guilded_age_money_head_political_cartoons.pdfIn PDF document text
    • https://s3.amazonaws.com/sugowubuf/potato_pancakes_bisquick_mix.pdfIn PDF document text
    • https://s3.amazonaws.com/farezelof/danganronpa_trigger_happy_havoc_bad_ending_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/tumasun/english_to_spanish_dictionary_apk_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a84feb31-c3cc-4e06-907c-ab75cd80592c/fonudibevunef.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_off0000d9b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9B4 4840 bytes
SHA-256: b97947cb485a0b34d22c7a05e109c99960cc6c3fdbe87f6bfda7c3519ab815be
font_01_sfnt_off0000ea1d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA1D 10428 bytes
SHA-256: aa70b63b6a5c9a5cd40ede6ad0761e5136a412936df4e6ad6d9c36a8b542f62c

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