Malicious PDF — malware analysis report

Static analysis result for SHA-256 403c2876377d983a…

MALICIOUS

PDF

74.6 KB Created: 2021-02-28 11:09:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 17e8d03032bb5b9d8cc20b6adfdb2202 SHA-1: e90a8077f81697764899c5d59be7652eef29d861 SHA-256: 403c2876377d983a64aa05d436904364e0b4135728f7d6ebcefb1240804d88cf
156 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The presence of numerous external links, including a link farm heuristic, suggests an attempt to redirect users to potentially harmful websites. While no scripts were explicitly extracted, the PDF structure and embedded URLs point towards a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://mezovuduw.ru/strik?utm_term=scratch+tutorial+game+easy PDF link annotation
    • https://babapijolirex.weebly.com/uploads/1/3/1/4/131409508/56a3e.pdfIn PDF document text
    • https://cdn.sqhk.co/bomumuxa/gcgjieF/62153155558.pdfIn PDF document text
    • https://cdn.sqhk.co/xipepovivik/DjCjdvo/bright_lights_dog_training.pdfIn PDF document text
    • https://cdn.sqhk.co/tatogevi/ggOjd5K/7800818805.pdfIn PDF document text
    • https://cdn.sqhk.co/navimoxa/cclyhhf/buzz_cut_with_beard_styles.pdfIn PDF document text
    • https://cdn.sqhk.co/xojoweva/ibuhcKp/quality_management_definition_business.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378623/normal_600a0e5296617.pdfIn PDF document text
    • https://xalekosud.weebly.com/uploads/1/3/5/3/135350534/fc0e957.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386851/normal_5fe8ac4fa7b13.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379744/normal_6029e12c65e5d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4493221/normal_600995b65c922.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4410013/normal_5fdd941328b18.pdfIn PDF document text
    • https://cdn.sqhk.co/bekutojeke/ACibhdc/city_of_life_and_death_movie_download.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/bejikefowu/venom_movie_imdb.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_off0000e71d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE71D 5416 bytes
SHA-256: c3dffc802788982746d16b7251f6b9622741b62038ed33d01936b4f0e67c3e25
font_01_sfnt_off0000f966.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF966 10416 bytes
SHA-256: 5a4b27bc3a1b40408e2693b27f169412dceb6d60a5a5dc5d0869a0603b8687ab

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