Malicious PDF — malware analysis report

Static analysis result for SHA-256 f11b1c5d20af39ab…

MALICIOUS

PDF

72.4 KB Created: 2020-11-20 09:50:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: af59d626e6941bcad09a0e2f16c61406 SHA-1: 1f28286067a3bf800827e453c769bfbe3e5a580a SHA-256: f11b1c5d20af39ab829da523b73ff03fd6b5a6dd915644f7489e537cb5f69828
156 Risk Score

Malware Insights

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

The file is a PDF containing numerous external links, with one heuristic specifically identifying a 'PDF_SEO_LINK_FARM'. The ML classifier and ClamAV detection strongly indicate maliciousness, with ClamAV identifying it as 'Pdf.Phishing.Trojan'. The embedded URL 'https://traffset.ru/123?utm_term=cp+biology+midterm+review+answers' likely serves as the primary lure, directing users to a potentially malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://traffset.ru/123?utm_term=cp+biology+midterm+review+answers PDF link annotation
    • https://jakemujilofadam.weebly.com/uploads/1/3/1/3/131380171/1287566.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367665/normal_5f875921adf3d.pdfIn PDF document text
    • https://vekaluledezo.weebly.com/uploads/1/3/4/2/134235689/9775699.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/kufazete/12335364879.pdfIn PDF document text
    • https://s3.amazonaws.com/tubupejevomo/catholic_answers_apologist_salary.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1475086f-da11-4f02-84c9-fb0a94e9f472/84822852660.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5e4662d8-ae3e-4e53-83d5-d9514b47c688/boom_bam_bop_pow.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/34ae6c93-962b-47bf-914e-1ae5f1eec402/casio_ga110-1b_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/sezebepit/zojupunegejapu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cf5b5bc2-a475-4df0-b977-19de5bdc618b/50189532608.pdfIn PDF document text
    • https://s3.amazonaws.com/luramamelolem/42172265178.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/37777e45-17e7-4d4e-87d8-5e3a3aab1323/41206362248.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3bf440e3-b01f-4cda-a75e-466e65aedfc8/vipovunufenepiboxiji.pdfIn PDF document text
    • https://s3.amazonaws.com/jidosatikim/xoxomaboxujofupimopad.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_off0000daf2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDAF2 5576 bytes
SHA-256: 6a9b2fb0db7580c6ebb7dbfb07f4bdaf8bb56a5df608fc33daf760519a8c9183
font_01_sfnt_off0000eddc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDDC 11920 bytes
SHA-256: 3c6cda1ea5487c6020205f99a0ed1cc530bbae5fa504cfaa92ed9b1ed2e3880e

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