Malicious PDF — malware analysis report

Static analysis result for SHA-256 2f7bc80d3ef5855f…

MALICIOUS

PDF

74.5 KB Created: 2021-02-16 07:29:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 6cf3670113e555da154b46353c19fad6 SHA-1: 4bc1d4fbb05d0559939db5c1e40fa109175e575f SHA-256: 2f7bc80d3ef5855f981c537387ca5006d2085f271b6c8c1044d4816c2301f5e9
126 Risk Score

Malware Insights

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

The PDF contains numerous external links, many pointing to disposable domains and likely serving as part of a link farm or phishing campaign. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest it's designed to redirect users to malicious sites, potentially for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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 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://jacksth.ru/strik?utm_term=how+to+use+ab+doer+twist+scale PDF link annotation
    • http://winoorama.website/ferokitirejoztu4je.pdfIn PDF document text
    • http://mesretly.xyz/kibevatenovevosetowbaxff.pdfIn PDF document text
    • https://sinaxerepedosuj.weebly.com/uploads/1/3/1/3/131398545/mejonifewewiza.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414488/normal_5fe73f2ab0d82.pdfIn PDF document text
    • https://biwamuneluzotip.weebly.com/uploads/1/3/2/6/132696598/wejaxowozif_jogelitumeg.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4386849/normal_5fcfea80a1684.pdfIn PDF document text
    • https://cdn.sqhk.co/tefazaturar/ifjavge/73402169497.pdfIn PDF document text
    • https://lanasasaf.weebly.com/uploads/1/3/0/8/130815311/makexewixibexu.pdfIn PDF document text
    • https://cdn.sqhk.co/fazejitev/Pljihcg/march_assist_app.pdfIn PDF document text
    • http://ctuxuu.com/diggro_user_manual_s2n900u.pdfIn PDF document text
    • https://dikarofojosej.weebly.com/uploads/1/3/3/9/133988548/f10b122.pdfIn PDF document text
    • https://jopogerepoji.weebly.com/uploads/1/3/5/3/135307159/kifunarukes-woxijerilivek.pdfIn PDF document text
    • https://puluduzi.weebly.com/uploads/1/3/1/4/131453343/wavoxoziw.pdfIn PDF document text
    • http://begemotiks.space/jejojujuga10f0o.pdfIn PDF document text
    • https://cdn.sqhk.co/pukazibat/b6idhaM/61366730042.pdfIn PDF document text
    • https://misamizejip.weebly.com/uploads/1/3/4/3/134348089/pawusagizi-zuvexopax.pdfIn PDF document text
    • https://zekufizow.weebly.com/uploads/1/3/0/7/130775694/c21eef5e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4474978/normal_60109b1069020.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/rimepusox/adanga_maru_movie_isaimini_hd.pdfIn PDF document text
    • https://s3.amazonaws.com/fofeguj/he_s_a_tramp_sheet_music.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_off0000d4b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD4B6 4904 bytes
SHA-256: dea3995fcf786c90a2790f64851a4e26a75c947684b5f34d0b889aa1230a7ee4
font_01_sfnt_off0000e57f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE57F 12416 bytes
SHA-256: 05a70144b41d2c72565ebf27428f04cde6bf1bf2d54a5f0037c4657b1fba6db2
font_02_sfnt_off00010ebe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10EBE 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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