Malicious PDF — malware analysis report

Static analysis result for SHA-256 03c5342e62e3334d…

MALICIOUS

PDF

71.5 KB Created: 2020-11-16 12:20:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 21d8e72c94fa7626eec13e8e07a2bb07 SHA-1: 25e45c5c5618e7fe69862562f0e46ec4895b7887 SHA-256: 03c5342e62e3334de2b13ab11aaeba32569131443c45433662125a6266e1973a
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

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://traffnew.ru/123?utm_term=turtle+shell+rot+pictures PDF link annotation
    • https://fulojozizarotuv.weebly.com/uploads/1/3/4/3/134318677/berasagumiw_gatiwurame.pdfIn PDF document text
    • https://jolibudowuw.weebly.com/uploads/1/3/4/5/134596284/bizozadejudasu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415936/normal_5f966d6948e1d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372983/normal_5f99e7404042f.pdfIn PDF document text
    • https://naletonuve.weebly.com/uploads/1/3/4/3/134381452/wagolapabupoxezidu.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://uploads.strikinglycdn.com/files/7ca3a739-78e8-4f69-b1bc-3a7da5b390e4/digekujojuverikegonagatak.pdfIn PDF document text
    • https://s3.amazonaws.com/kopisigapub/primitive_technology_book_by_john_plant.pdfIn PDF document text
    • https://s3.amazonaws.com/kotenu/carrier_apu_pc6000_parts_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/31e71028-ee2c-4ae8-aa95-88bd196aa77b/dekufebexevanuzusimatax.pdfIn PDF document text
    • https://s3.amazonaws.com/sonutopexaramuf/the_hallelujah_diet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/143e6511-3f9c-4fdf-87ba-fe352a5052be/rularuwude.pdfIn PDF document text
    • https://s3.amazonaws.com/naranofinovujix/83162576815.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9dae5ae8-fb2e-4783-9652-20508d0c3215/10148842658.pdfIn PDF document text
    • https://s3.amazonaws.com/zemigiduwagafu/backus_pine_river_school_district.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d09a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD09A 4536 bytes
SHA-256: d5a1880114f1e543403c21b0b8dbe87c7dbdcd56a3edee626ba4e41f42167da6
font_01_sfnt_off0000e020.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE020 10240 bytes
SHA-256: f7401bf1605d38d3bd0ad4a4f67e3f9f48006f98d5c0a583e3cc752ba1074169
font_02_sfnt_off00010311.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10311 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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