Malicious PDF — malware analysis report

Static analysis result for SHA-256 b09a4eec2d7cfc03…

MALICIOUS

PDF

68.8 KB Created: 2020-11-12 19:35:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: e73e528d4631c9e8d83ed77bcbd3df8e SHA-1: 1fc3a642ce5970f86b16864c7b8829a2f94ca9bd SHA-256: b09a4eec2d7cfc032f0b567a779e62d6877a51351765b1da3190c925e53ac1a0
96 Risk Score
Tags
free-cdn-ebook-manual-lure

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 an embedded URL that directs users to a suspicious domain, likely for phishing or malware distribution. No scripts were extracted, but the presence of the external URI and the ML/ClamAV detections strongly indicate a phishing attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://trafftec.ru/strik?utm_term=can+you+deauthorize+all+computers+in PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4414701/normal_5f966f929fcf0.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/8b130170-91d4-4ad7-8156-9f26ad55a4fd/54678021971.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c83056f2-2cb6-4e83-9b16-b3e1ccf90ea5/27154991820.pdfIn PDF document text
    • https://s3.amazonaws.com/bevekizadoxuj/51924205536.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/02c736d3-0fa5-47cb-b926-178bef4cef20/fozujitojotuporiximuzeju.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a805ed4f-3e00-48d9-bb75-38b369f28213/35688255254.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/720d0283-cf7e-4803-84b5-ffc8b1a5309c/dumividujojerajubujazina.pdfIn PDF document text
    • https://s3.amazonaws.com/bikikanafopavu/7360319718.pdfIn PDF document text
    • https://s3.amazonaws.com/fasanag/namenawam.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a5af472f-6b2c-4e21-9691-ef035cb0947d/75124035025.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/856938c1-eb9b-456e-8bbe-f3af2f93a832/54502958657.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f72f33bd-1855-4fcf-9124-34736eeac19a/zulubumoxusofegozogisiguf.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8a03b788-1d6a-46bf-9c03-f9a4ee06d7c9/xoxuvoxozet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/640eb267-77cd-4d02-81ed-4c90f0330aef/vuwiza.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_off0000cf4c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF4C 5372 bytes
SHA-256: 39b7b71bf75b34795f5d89d60405fce684ad08faa7cbc432b1c38a62fe9f3780
font_01_sfnt_off0000e16d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE16D 10832 bytes
SHA-256: 60963181bad0b630b0699dc537abbf2146a4bdf55c25faecc90eee90ab74cfe8

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