Malicious PDF — malware analysis report

Static analysis result for SHA-256 2ed148fd8cd0619a…

MALICIOUS

PDF

64.4 KB Created: 2020-12-07 18:55:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: b2be68a0c7a259106fb6f5d10100a1ab SHA-1: 1a5876fcd326560cdef91554b134165b96ca0a21 SHA-256: 2ed148fd8cd0619a8cbc6ec185d6c5365b101eacae8d5a8f54d7a43a5ce2d83f
214 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, with critical heuristics identifying it as a malicious redirector link and a PDF link farm. The ML classifier and ClamAV also flagged this file as malicious, specifically as a phishing trojan. The presence of many external links suggests an attempt to drive traffic to potentially malicious or SEO-manipulated sites.

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://traffking.ru/123?utm_term=conservation+officer+salary+uk In PDF document text
    • https://cdn-cms.f-static.net/uploads/4365562/normal_5f874f3dc8935.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381101/normal_5f9ecd056f83a.pdfIn PDF document text
    • https://jeretidaker.weebly.com/uploads/1/3/4/5/134595905/gividorexugew-sigadubex-kutozexisuxafos-ganebebete.pdfIn PDF document text
    • https://wefamojugibe.weebly.com/uploads/1/3/1/1/131164519/d87fbc6847e61ac.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/f1a46a59-f764-4f42-87d9-bda85641f6f0/microbiology_a_laboratory_manual_10th_edition.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbcfad179c08c7f2b9ec071/1606220498008/ready_player_one_online_free_watch.pdfIn PDF document text
    • https://s3.amazonaws.com/sizadagazagaj/nazipodarirubaguwuzi.pdfIn PDF document text
    • https://s3.amazonaws.com/gasodamuza/canada_tourist_map.pdfIn PDF document text
    • https://s3.amazonaws.com/musoxifuvitalo/musujuvixogumufixunun.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8cbb55eb-f532-4bed-a656-d0bba806c511/naranakelosajogerozepemo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/235dfe7b-977b-4581-8c2c-f820c8d2637d/rimworld_packaged_survival_meal.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4566cf98-5894-428b-a198-ad1ff54f4376/direito_tributrio_luciano_amaro.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a6611ca2-726c-4123-8bf2-e920acad21ae/puzinikupoguvunemijaliru.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_off0000c019.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC019 5008 bytes
SHA-256: b5330806381dc8eaa604ec09e7c710b26c74d81f313d09afb3a3f29972acc9d5
font_01_sfnt_off0000d142.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD142 10640 bytes
SHA-256: 42a7c1d944db0be55f19a8be939e74a5332d8efbf43e13e8db79109a5bf2dda8

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