Malicious PDF — malware analysis report

Static analysis result for SHA-256 ecdb90f490b3de64…

MALICIOUS

PDF

72.1 KB Created: 2020-12-27 23:29:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: cecd315f64c6ed24016c58ac23b2a6aa SHA-1: 0a58d09d87f5ea3255006aa1827765e35a505848 SHA-256: ecdb90f490b3de6456e77c16ea4e6ee409cc0ab2f05d8457f8c9f1cf95cb2db0
156 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains a large number of external links, with one notable URL pointing to 'trafffi.ru', suggesting a phishing or malicious redirection attempt. The presence of embedded PDF link farm heuristics further supports the 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://trafffi.ru/123?utm_term=destiny+2+shaft+13+edz+location PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4489734/normal_5fd09f8d70a18.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4471464/normal_5fcbabf1b6ca2.pdfIn PDF document text
    • https://cdn.sqhk.co/lupejatuwi/q6haymW/losebu.pdfIn PDF document text
    • https://cdn.sqhk.co/bibunifez/RRdwaSm/memimiratuxot.pdfIn PDF document text
    • https://gadufekovofu.weebly.com/uploads/1/3/4/7/134764592/loxilubepofu.pdfIn PDF document text
    • https://cdn.sqhk.co/kibizatududo/xgfijhi/bikini_fitness_workout_plan.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476127/normal_5fe8ef1483af2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4480588/normal_5fb661534e855.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/fosalizuzu/19452354600.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8a0d166a-13cb-4560-8542-7161de09f3cf/wurijaj.pdfIn PDF document text
    • https://s3.amazonaws.com/jadudusujuje/structure_of_the_earth_s_atmosphere_worksheet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fd0e5187-16ca-4bc5-acc2-56a028e46bdb/puxisinuzijawisi.pdfIn PDF document text
    • https://s3.amazonaws.com/viboxikuz/nimenavotiwiwikami.pdfIn PDF document text
    • https://s3.amazonaws.com/davolazupivowi/advantages_of_workforce_diversity.pdfIn PDF document text
    • https://s3.amazonaws.com/tulosa/rukota.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_off0000ddcc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDCC 5512 bytes
SHA-256: 39a356d030cac51bf88b42c40bc47dcfc784d5a7aee6b06f57b9a8e6d6a78143
font_01_sfnt_off0000f0ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0AD 10144 bytes
SHA-256: 2cb63cd73f316e81f7990484e6045ea9aed28b1bf0196f7ca08f5e05a24aca00

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