Malicious PDF — malware analysis report

Static analysis result for SHA-256 26be7863bce4b64e…

MALICIOUS

PDF

76.9 KB Created: 2021-05-07 01:29:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 3bff6ee6c00d32206af01e2dc13814aa SHA-1: 1ba6558452c5ac4917658f119d3f0557d8f46b61 SHA-256: 26be7863bce4b64e79b56b136b88ea841757c269da30d93b49b751d97f7cb1d3
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, a common tactic for link farms or phishing campaigns. The ClamAV detection and ML classifier strongly indicate malicious intent, specifically identified as Pdf.Phishing.Trojan. The presence of embedded URLs, including one pointing to 'resalured.ru', suggests an attempt to redirect users to malicious content or phishing sites. Although no scripts were explicitly extracted, the PDF structure and heuristic firings are indicative of a phishing or malware distribution attempt.

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://resalured.ru/strik?utm_term=dell+inspiron+e1505+factory+reset PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4491152/normal_6055a3140721c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369796/normal_604b189e251a6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4425255/normal_601f3bfe147b6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4481667/normal_5fc7ba7db30fa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4494166/normal_60228d648dc58.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388428/normal_605af2a8e1731.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4486984/normal_6008ebd4d93b3.pdfIn PDF document text
    • https://bozobamawokoruv.weebly.com/uploads/1/3/4/3/134350924/fuxuki_bunagesoboxab.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465000/normal_6039d760e55f6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410414/normal_60523d692e5a6.pdfIn PDF document text
    • https://zolotamazuragif.weebly.com/uploads/1/3/2/7/132712333/5774969.pdfIn PDF document text
    • https://sejomuxajifaged.weebly.com/uploads/1/3/1/4/131437693/1387402.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470826/normal_6058433923f7e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4482863/normal_60309cb402151.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/dc3c50c2-0424-4053-bdf6-67cef319b2fd/how_to_put_samsung_dishwasher_in_diagnostic_mode.pdfIn PDF document text
    • https://s3.amazonaws.com/jadere/how_to_get_to_menu_on_orion_tv_without_remote.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2d5b08ed-963f-410c-9001-8db620e714cd/94596049542.pdfIn PDF document text
    • https://s3.amazonaws.com/zepifudoxapo/zimoz.pdfIn PDF document text
    • https://s3.amazonaws.com/kikunojulejuj/95202585927.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e48a4e06-20da-48f8-a48c-973f0c51d986/36933220639.pdfIn PDF document text
    • https://s3.amazonaws.com/mexijegedakol/34972934072.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ab815cb9-2947-46da-9cd3-ec90e78e3fdf/how_much_does_a_40_hp_johnson_outboard_weight.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_off0000eeb3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEB3 5428 bytes
SHA-256: f2c33aebec79ac9e0ea35e706d7855df277cfdde7f810ecaad3ead18e5190542
font_01_sfnt_off00010154.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10154 10712 bytes
SHA-256: 7ec8ef453af13764cc27126d8acc2cb0ca8274e1c47e0465a4da59fc38e4daae

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