Malicious PDF — malware analysis report

Static analysis result for SHA-256 42400ddf70d90421…

MALICIOUS

PDF

69.5 KB Created: 2020-12-20 05:53:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-07
MD5: 57e4fd9e83f5187e7bf564a596c5999a SHA-1: b7d3850c83d8c237530e2785df8b892406e2eb5f SHA-256: 42400ddf70d90421ac37d88f7bbe97ae79f1cfbd1d8f48dfa0ad7653c0e2267f
186 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV. It contains a large number of external links, many of which are hosted on disposable domains, suggesting a link farm or SEO manipulation tactic. The primary URL, 'https://trafffi.ru/strik?utm_term=volvo+penta+sx-m+outdrive+manual', indicates a potential lure related to technical manuals. No scripts were extracted, but the presence of numerous external links and the overall structure point towards a phishing or malicious redirection attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://trafffi.ru/strik?utm_term=volvo+penta+sx-m+outdrive+manual PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4371536/normal_5fa30ffb9eb60.pdfIn PDF document text
    • https://bitujidup.weebly.com/uploads/1/3/4/5/134598072/waban_falekivodexa_gupupibupake_vikirejox.pdfIn PDF document text
    • https://fidexodopisulo.weebly.com/uploads/1/3/4/8/134861067/xekimulir.pdfIn PDF document text
    • https://letazofuwukuge.weebly.com/uploads/1/3/4/8/134869061/vubikupadazopadidedi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4460725/normal_5fbd4f49436c6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4451352/normal_5fc8d90ea852a.pdfIn PDF document text
    • https://gavedomosuzutu.weebly.com/uploads/1/3/4/2/134234743/51b87.pdfIn PDF document text
    • https://bosebekepomij.weebly.com/uploads/1/3/4/8/134870535/2352498.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fc5933e8787e879898ba58f/t/5fd175bfc10336458b2ca0e5/1607562691007/fakezexatirazasukikira.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ac404577-3150-40c0-ab04-00740819e00d/rokalizifefereganipo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8f3e320e-067c-4e43-a03b-b8f2f2342695/zikijegawojamebiniwesep.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e9c6401e-37ac-45b2-8507-0b733a6957f3/bmw_7_series_f01_repair_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a3f09ea8-18ce-4b4a-a5de-bfa9f3504d22/28650300727.pdfIn PDF document text
    • https://s3.amazonaws.com/suximawo/akcent_songs_free_320kbps.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7a560bfd-5f04-494c-b046-ca7e23be698e/36410483214.pdfIn PDF document text
    • https://s3.amazonaws.com/sugaguxagu/ipad_annotate_pencil.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fce83a6142f2433c72768f9/t/5fd6562c96ed101a3e3e6168/1607882284709/77361509671.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_off0000d07c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD07C 5232 bytes
SHA-256: 98964098575d8e46cb19dc082f4648f3b3a76f2cae379557a06c6f070f25bc56
font_01_sfnt_off0000e23d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE23D 11464 bytes
SHA-256: 4cb656281e73a6d94895f557317d8898b97051af7c2bb1906affc3ca71776c74

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