Malicious PDF — malware analysis report

Static analysis result for SHA-256 3cf5e029af6db023…

MALICIOUS

PDF

70.7 KB Created: 2020-11-12 23:15:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: b7419f719abd3c9fdf61ed261136e5b1 SHA-1: 28a0df70db8fddc0e746959517b7db0f6dd1fed0 SHA-256: 3cf5e029af6db0231f873b9d7252f617a318f0e562a193543587ca09346dd75b
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic identifying a link farm pointing to 30 external PDFs. One of the primary external links, https://traffnew.ru/strik?utm_term=the+outsiders+study+guide+questions, suggests a phishing or malware distribution attempt disguised as a study guide. The ML classifier and ClamAV detection strongly indicate malicious intent.

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://traffnew.ru/strik?utm_term=the+outsiders+study+guide+questions PDF link annotation
    • https://rebabamebuno.weebly.com/uploads/1/3/4/3/134355200/ca3a6ea5f.pdfIn PDF document text
    • https://kepijiloxa.weebly.com/uploads/1/3/4/1/134108658/7022eeb81aa9043.pdfIn PDF document text
    • https://jozipomona.weebly.com/uploads/1/3/4/4/134479443/fafad52ffc.pdfIn PDF document text
    • https://xobijetulotifo.weebly.com/uploads/1/3/4/2/134234675/xugojodubejimifabiv.pdfIn PDF document text
    • https://jivetigaforivuj.weebly.com/uploads/1/3/4/3/134350389/lexugalelarer_zusafobaf_vagutupixun.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/zepifudoxapo/11373658759.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6fa0405a-076f-4428-8799-b80d36fce26e/chemistry_chapter_7_study_guide_for_content_mastery_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/subud/torileposibefazof.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d6dbe00c-cc69-45ac-9a0a-deb0ea3a1c4e/22302297103.pdfIn PDF document text
    • https://s3.amazonaws.com/xipavir/certificate_of_good_conduct_china.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4b4103f7-0368-475d-996e-1ac984667dcb/60612079245.pdfIn PDF document text
    • https://s3.amazonaws.com/kisimujuk/jojasegaboz.pdfIn PDF document text
    • https://s3.amazonaws.com/fefurorobumi/polagagiriripufokijodulig.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/34d79208-8945-4f66-a92b-1dfa34c1c61d/33835934354.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bb2b4246-e995-4aae-9b91-c4dc69525fac/norma_oficial_de_enfermeria.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/039cd647-d7fc-4807-9fc9-f0461f6116c4/circumcenter_and_incenter_maze_answers.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000da2f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA2F 5020 bytes
SHA-256: fe0e20aa873df4d2dcf58323563b9e3c4ad126b60fd98afebf007bd66fa2e3b5
font_01_sfnt_off0000eb39.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB39 10260 bytes
SHA-256: 25267c00f4f58ae9b5887d48fbbf06cb28e15556a68e2fa038afeed07b97246a

Open this report in the interactive analyzer, or submit your own file for analysis.