Malicious PDF — malware analysis report

Static analysis result for SHA-256 b320218023a7dd9b…

MALICIOUS

PDF

79.3 KB Created: 2020-11-25 17:19:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: d103fbc4b14c83b6c27f9c94945857aa SHA-1: b49f0458faa2572c6651740a2dc4574d120c3dae SHA-256: b320218023a7dd9b861edac163deed574ed9c2a4af131412272f5d9d93e1959f
164 Risk Score

Malware Insights

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

This PDF document was flagged by multiple heuristics as malicious, including a ML classifier and ClamAV detection. It contains a large number of external links, suggesting a link farm or phishing attempt. The document body, though heavily obfuscated, appears to be a lure related to a camera manual, likely to trick users into clicking on malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://trafffe.ru/strik?utm_term=canon+powershot+sx150+is+manual PDF link annotation
    • https://lijonalorobu.weebly.com/uploads/1/3/4/3/134340538/a170e51eb096.pdfIn PDF document text
    • https://detosujedeke.weebly.com/uploads/1/3/4/3/134371576/vaporatepupexo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417418/normal_5fa39e78bf68c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371523/normal_5fa9e32e29b6b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369519/normal_5faeedb854da5.pdfIn PDF document text
    • https://rabebazenapaju.weebly.com/uploads/1/3/4/7/134771608/5660756.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445107/normal_5fa10ed2c149e.pdfIn PDF document text
    • https://gawosiluzetur.weebly.com/uploads/1/3/4/6/134631715/bed7f4.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/sisaxu/apa_style_6th_edition_deutsch.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d3c5b8eb-2528-487b-8dd9-551027f61037/sejulax.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b81a56ee-c4ce-46bd-9647-a3472840d716/76543073901.pdfIn PDF document text
    • https://s3.amazonaws.com/zumomasugipeno/father_anthony_ochoa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/386a89cc-c61d-4636-91ae-7035bc62fa53/35161104170.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e402.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE402 3724 bytes
SHA-256: ce22c8eaa1f53a77d563481fc3f0abc202627ce0e69ac912df19b60822d178aa
font_01_sfnt_off0000f13f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF13F 5440 bytes
SHA-256: a234146bac49292037c9e556f8dc029a37deab85ad091a063ab9e9a76bd32ff6
font_02_sfnt_off000103af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103AF 13728 bytes
SHA-256: a8313eedc345790d541e3cd74b13c4a78f5c62b131fbbaa5a2c88eb012013683

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