Malicious PDF — malware analysis report

Static analysis result for SHA-256 a62837926957eaeb…

MALICIOUS

PDF

73.6 KB Created: 2020-12-26 02:58:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: be360e1ef8b1209ed20747257189d5ac SHA-1: b23f8b424acd2a526d7b9125626c0e5fa7fba60c SHA-256: a62837926957eaeb3bc3b1c48ec9d82235f193ac0d76577898c3eac60bf22cd2
214 Risk Score

Malware Insights

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

The PDF contains a link farm designed to redirect users to malicious infrastructure, specifically identified by the heuristic PDF_MALICIOUS_REDIRECTOR_LINK. The presence of numerous external links, as noted by PDF_SEO_LINK_FARM, further supports a phishing or malicious redirection attempt. While no scripts were explicitly extracted, the PDF structure and embedded links indicate a malicious intent to lead users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • 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.
  • 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://ggtraff.ru/strik?utm_term=action+for+2-+4+players+pro+apk+hack In PDF document text
    • https://fakimodixoto.weebly.com/uploads/1/3/0/7/130739088/355c76f303.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489992/normal_5fbf2d88e876e.pdfIn PDF document text
    • https://duxixujojive.weebly.com/uploads/1/3/0/7/130739103/6c26f1410aadb18.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/zedudo/25102123865.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f009f801-71d6-47ae-bdda-77ed86c7c7e9/kidilimifu.pdfIn PDF document text
    • https://s3.amazonaws.com/suxuzubojut/vegas_pro_14_edit_free.pdfIn PDF document text
    • https://s3.amazonaws.com/desekusoxi/76027486114.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7464f528-30b3-492d-a551-f2306470c95a/lowes_joplin_mo_sunday_hours.pdfIn PDF document text
    • https://s3.amazonaws.com/xunilukegez/illinois_tollway_pay_online_lane.pdfIn PDF document text
    • https://s3.amazonaws.com/zonebon/rozovosuvokorexilakum.pdfIn PDF document text
    • https://s3.amazonaws.com/lorifumofelu/70672952695.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
font_00_sfnt_off0000d0b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD0B4 5296 bytes
SHA-256: 8ee731e6a5daefd63c59c74f19497dbbe5d83a6f66d8ad180bb45edaaceb7b27
font_01_sfnt_off0000e2b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2B4 11956 bytes
SHA-256: f0cc9d859345455b952b25863d966be0498c1145cc6008e0ea457bb6b7796aef
font_02_sfnt_off000109c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109C1 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

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