Malicious PDF — malware analysis report

Static analysis result for SHA-256 45a14f58b85a997e…

MALICIOUS

PDF

80.5 KB Created: 2020-11-25 09:09:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: b64e014d5e9c79615682d89458174103 SHA-1: d362bffeac6357c321bf63896ea9e0da118c788a SHA-256: 45a14f58b85a997ef6e8358530ab3af0d00467eac869c25c75e39406c0cf9152
156 Risk Score

Malware Insights

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

The PDF file contains a significant number of external links, identified as a 'PDF_SEO_LINK_FARM' heuristic. One of the primary external URIs points to 'trafftec.ru', and another prominent link leads to a Weebly subdomain. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or distributing further malware. No scripts were extracted, but the structure suggests an attempt to direct users to potentially harmful external resources.

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://trafftec.ru/strik?utm_term=17th+century+german+clothing PDF link annotation
    • https://basivukapipex.weebly.com/uploads/1/3/4/5/134528325/menumudiru_pawif_bukovapugipe_zolazewoda.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426690/normal_5f9bd5227c0f9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405181/normal_5f945025c173f.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/lorerexeg/business_driven_information_systems.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fc9e0989-9396-43db-a7b2-18a0d4f0bf32/44267145165.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9a0b83b4-2071-4d0d-8980-ba30b757e6ca/viwogalepexuxe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ce89a98e-0001-4b2d-a54b-c87dec7329f6/munulogetobo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e9ecb672-87be-4e40-a7fa-9289dc594e90/zuvumiwavidaka.pdfIn PDF document text
    • https://s3.amazonaws.com/pazifetanegapu/loguguvej.pdfIn PDF document text
    • https://s3.amazonaws.com/zodawanuror/android_studio_update_version_name.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a31ae6ad-76b3-4ecc-b96c-29e636167066/jezavivawubel.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_off0000f08d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF08D 5056 bytes
SHA-256: 4a4cd6fbcf71311a42fa4cdecafe44b0a684556adecf1baab5312a8a0ebb0945
font_01_sfnt_off00010194.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10194 11360 bytes
SHA-256: 40809d6367d042c2d8d787f69785513a8cf4028c9c7d1fba815e74498a859fa3
font_02_sfnt_off0001273b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1273B 4324 bytes
SHA-256: 7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71

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