Malicious PDF — malware analysis report

Static analysis result for SHA-256 7ce1032daf363b2b…

MALICIOUS

PDF

61.2 KB Created: 2020-12-26 20:29:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: c868125e2422a69897254b6308419b7c SHA-1: eead4e75ea1df0b5d3574529b77ad8a8eed8ab5f SHA-256: 7ce1032daf363b2bfb8a624a78604fc21d5b631405cb60ab281755df6ebd16eb
186 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many hosted on disposable domains, indicating a link farm or phishing attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded URLs point towards a malicious document designed to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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.
  • 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.
  • 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/123?utm_term=outdoor+slate+tile+lowe%2527s PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4492546/normal_5fae4eee388ac.pdfIn PDF document text
    • https://vajepagipe.weebly.com/uploads/1/3/4/0/134000011/9e6fcc4bcedc710.pdfIn PDF document text
    • https://mavezuwunokil.weebly.com/uploads/1/3/4/6/134627141/9432399.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417025/normal_5f9832a3905c2.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4381751/normal_5fc558ed34747.pdfIn PDF document text
    • https://nodokesomizi.weebly.com/uploads/1/3/4/6/134656280/378c9a5.pdfIn PDF document text
    • https://gazezujebek.weebly.com/uploads/1/3/4/8/134881616/sulugibu_malogidipeza_tadusokudizuv_vewono.pdfIn PDF document text
    • https://wolofineso.weebly.com/uploads/1/3/4/5/134598063/jipiveperumavunavag.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/rebomedug/hori_hori_garden_knife_australia.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/55f04a34-93e1-4e15-b068-1d89cafa942a/zarunaxin.pdfIn PDF document text
    • https://s3.amazonaws.com/mavixu/advanced_english_grammar_activities.pdfIn PDF document text
    • https://s3.amazonaws.com/rubidokezive/tofexoxovo.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_off0000b6b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB6B6 4972 bytes
SHA-256: 7400e313f9093b7eeb12edc39f945c6f2c1741c2d39c09940d3484daffaa6c11
font_01_sfnt_off0000c7c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC7C0 9540 bytes
SHA-256: f460531c6fb7b05fa3208599eec63611d1ac8917fa2afa2ca2aff94055de502a

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