Malicious PDF — malware analysis report

Static analysis result for SHA-256 08dfc0a5476ae434…

MALICIOUS

PDF

80.3 KB Created: 2020-11-22 05:27:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: be8b075345c4c72a0905704f19719732 SHA-1: 3b5fb8e4e6664e98449bf106fece00d7f4faea74 SHA-256: 08dfc0a5476ae4346fe4f81700e357af15cf6b8876fc4458c34f6cbaceabbec2
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://trafficel.ru/123?utm_term=sorcerer+5e+feats PDF link annotation
    • https://dutitujazekap.weebly.com/uploads/1/3/0/8/130814390/kadijamiruvinugeno.pdfIn PDF document text
    • https://kalabuzamebuku.weebly.com/uploads/1/3/4/3/134339718/subapazaruwofe_zatomigoras.pdfIn PDF document text
    • https://katubebadidi.weebly.com/uploads/1/3/4/4/134474785/lewakefekidoripi.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/6d2dd6fe-17b3-4803-a5ad-08eb1b3dd6e1/fudenotaw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/72f54bcb-f7fb-4e8b-922c-a3fb591bbc8f/45341603262.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6e8b5c0c-ae41-4a11-aa60-023a1e2ad240/55383590773.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fd61ce33-2d25-41f2-8161-90df8dc03730/92947006827.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f47772bb-ad0f-4a30-8178-f782d96279d8/rekotawobolejiwu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8fb4f350-7202-4ded-ba85-6e6fb8ebb6f6/star_wars_theme.mp3.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6d520110-7ad1-4b68-b8d0-55bf16130f03/vadegoj.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/62426b7d-5054-46de-9d0b-61be2c26f958/nokuxapinewefobuge.pdfIn PDF document text
    • https://s3.amazonaws.com/kokesatodixon/revazifarazaj.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a867d997-a1ca-4712-9ea4-334d69d445f7/lip_sync_animation_reference.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1afd4249-aac6-4757-a043-167ca8686b5e/fundamentals_of_financial_management_14th_edition_free.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_off0000ff79.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF79 5072 bytes
SHA-256: b02da66735d3c4366758f7cf1898384c7f10316f4b2df7c3b511bb0e81d6629b
font_01_sfnt_off000110ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x110CA 10472 bytes
SHA-256: 9d001536fec72ac401f804c2608eaff80c8f652cc350adc9f1d60894dad48118

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