Malicious PDF — malware analysis report

Static analysis result for SHA-256 a394837f8b55cc68…

MALICIOUS

PDF

43.8 KB Created: 2020-11-09 14:05:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-03-01
MD5: 1136d004f5ae3f76e533e916dbd01aa2 SHA-1: 070f203eaeb999c0cec96557c0bd7a600d8764bf SHA-256: a394837f8b55cc6820da382d8716c0a6dbbb3ec1d6265dcb6893af48e42c20b0
184 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://traffking.ru/123?keyword=navy+pcs+travel+claim+processing+time In PDF document text
    • https://lesofetu.weebly.com/uploads/1/3/1/3/131378838/bda029b635.pdfIn PDF document text
    • https://fimosezit.weebly.com/uploads/1/3/0/7/130775491/vujupowa.pdfIn PDF document text
    • https://wipomozexabezi.weebly.com/uploads/1/3/0/7/130776841/fazuvide.pdfIn PDF document text
    • https://zegokovoni.weebly.com/uploads/1/3/4/3/134323662/1604523.pdfIn PDF document text
    • https://geredape.weebly.com/uploads/1/3/4/3/134349068/8529431.pdfIn PDF document text
    • https://vujofuda.weebly.com/uploads/1/3/4/3/134375628/mokana.pdfIn PDF document text
    • https://rineragafuvotut.weebly.com/uploads/1/3/4/4/134442037/kebavojakiv.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/henghuili-files2/cardiac_arrhythmia_mechanisms_diagnosis_and_management.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f675fbcf-e190-4805-a5a9-6108af4f39c8/2709588225.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6a1b0ddc-268d-43ed-bbe4-722080b0ba24/gevetefoxuvatotawaloravim.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d6afa2d8-2375-4ff1-8f65-5a6852e47aa4/votavisakavesil.pdfIn PDF document text
    • https://s3.amazonaws.com/pamavon/psychology_advising_umich.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/55615aa0-6361-4e67-b6f6-62205ad5ffcf/fozovutogar.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_off00006b99.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6B99 5384 bytes
SHA-256: bdbfe7d107f88898a6a5b8810343f227b57e72ab39c302c3a02517213ad46ba7
font_01_sfnt_off00007ded.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7DED 10840 bytes
SHA-256: 000b0ec3602e6127cb67e0b2671ee6dcffc66035e29a5909450b4cf0babe6f4a

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