Malicious PDF — malware analysis report

Static analysis result for SHA-256 d6795c4e152f61fc…

MALICIOUS

PDF

47.3 KB Created: 2020-11-02 23:39:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: fe1b6c35831f64438a96253727664a6a SHA-1: de53fc0389898e91a1cd47a40a4812ce754934a8 SHA-256: d6795c4e152f61fc786253068d6a6a6e3df028f9da2b921fdbd1d3994ca8f65a
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

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

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://ttraff.link/123?keyword=if+then+excel+formula+with+dates In PDF document text
    • https://cdn-cms.f-static.net/uploads/4417992/normal_5f9ab0f9a90bf.pdfIn PDF document text
    • https://papunagaku.weebly.com/uploads/1/3/1/3/131384156/69287c9de2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384142/normal_5f8de71d2a12d.pdfIn PDF document text
    • https://jakedekokobara.weebly.com/uploads/1/3/1/3/131381480/6431815.pdfIn PDF document text
    • https://vosasavowaje.weebly.com/uploads/1/3/4/5/134587316/josuvokugu.pdfIn PDF document text
    • https://depufavekozumel.weebly.com/uploads/1/3/4/0/134017714/xovipiguta_rizege.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://s3.amazonaws.com/jedaxopopuko/sales_and_marketing_notes.pdfIn PDF document text
    • https://s3.amazonaws.com/wikurixobelu/nigikatuxetib.pdfIn PDF document text
    • https://s3.amazonaws.com/sirasu/67626244898.pdfIn PDF document text
    • https://s3.amazonaws.com/sezebepit/kuxifazuboviropuke.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0502/8144/7607/files/how_many_pieces_in_chess_game.pdfIn PDF document text
    • https://s3.amazonaws.com/jumedemimo/hybrid_vs_purebred_organism.pdfIn PDF document text
    • https://s3.amazonaws.com/tetazino/ies_interview_questions_for_ece.pdfIn PDF document text
    • https://s3.amazonaws.com/remeranexe/editor_a_word_online_gratis.pdfIn PDF document text
    • https://s3.amazonaws.com/sibenuvokiwuz/earn_to_die_hacked_unblocked_66.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006b44.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6B44 5240 bytes
SHA-256: 17a5e9f900cec95513d40c7426e24491f2db52b447524c779927c96a4c1cda72
font_01_sfnt_off00007cec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7CEC 10852 bytes
SHA-256: 12dd91e82546d42eac512cf1a63d136e0fa13ffae1a6dcd1539232ba951a65a9
font_02_sfnt_off0000a21c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA21C 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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