Malicious PDF — malware analysis report

Static analysis result for SHA-256 2f7211a5ef224f5b…

MALICIOUS

PDF

77.5 KB Created: 2021-04-01 05:08:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-20
MD5: 05331097a158e1b5e1ef1f809786881c SHA-1: 59c75cb19c97dcf4fc5ffd757a0464dd2a1398cc SHA-256: 2f7211a5ef224f5ba292fa4181e4e026b14156febf20c260785891a28151c25a
186 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many hosted on disposable domains, suggesting a link farm designed to redirect users to malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URIs point towards a malicious document designed to exploit users through deceptive content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • 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.
  • 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://fokemale.ru/award?keyword=anticapitalismo+para+principiantes+pdf PDF link annotation
    • https://tugovupovo.weebly.com/uploads/1/3/1/3/131380456/1444591.pdfIn PDF document text
    • https://lukimozogu.weebly.com/uploads/1/3/4/6/134638062/pijatedadim_fibifakufuwon.pdfIn PDF document text
    • http://form-lnstagramcopyrightservices.com/8535163842oatwg.pdfIn PDF document text
    • https://xagigerabep.weebly.com/uploads/1/3/1/4/131483632/8028285.pdfIn PDF document text
    • https://xemamipu.weebly.com/uploads/1/3/0/8/130813095/mutefini.pdfIn PDF document text
    • http://weraka.online/96032597870zp3ai.pdfIn PDF document text
    • https://vekoduxiboba.weebly.com/uploads/1/3/1/3/131398498/d4ba92b0.pdfIn PDF document text
    • https://ferizovewop.weebly.com/uploads/1/3/4/8/134887996/8318934.pdfIn PDF document text
    • https://longseller.com.ar/producto/anticapitalismo-para-principiantes/In 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/ae6c79c3-fefb-44b0-9e28-cdcc6302a8c0/watch_war_of_the_worlds_2020_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/10be303c-6232-464a-9859-973d01fcdf89/far_from_the_apple_tree_film.pdfIn PDF document text
    • http://nekoraxevab.rf.gd/agatha_christie_la_serie_infernale.pdfIn PDF document text
    • https://5ccda086-29c7-4024-8a93-689df1f3b89c.filesusr.com/ugd/ed8107_b8033b07ca254c679a4bcf83df8481db.pdf?index=trueIn PDF document text
    • https://da5bec28-7969-4117-8ffb-5069fce5e80c.filesusr.com/ugd/31593d_0060496d19364d14b6ea0317f261a8d4.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/da30a326-1312-4371-89cc-6a47801e2a7f/wejoweromuselure.pdfIn PDF document text
    • http://fevenubonanez.rf.gd/betting_raja_film_video_3gp.pdfIn PDF document text
    • http://minirulo.epizy.com/27049696483.pdfIn PDF document text
    • https://276658a2-c6b1-4a23-bc3b-56c82bce4278.filesusr.com/ugd/f9448a_fc7012a28b564a13a9dd5cf17b0d1605.pdf?index=trueIn PDF document text
    • https://081e7fb2-604d-424b-9b75-a58d54a71a44.filesusr.com/ugd/abd6ea_f364bbf4c7514c58a2287a688caa8ebe.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/816764ba-abac-45ae-a7c0-203f6c1f43e4/54430526586.pdfIn PDF document text
    • https://c6111751-42b6-464f-a8b1-832d492ff999.filesusr.com/ugd/3d0627_847102f9943e48d8bd294f6fe85e2624.pdf?index=trueIn 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_off0000eb98.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB98 5288 bytes
SHA-256: b5d064c1fe05cc9b3a618d48eadda700a8b054a5da01b4654acd57cd81f749c4
font_01_sfnt_off0000fd7d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD7D 12728 bytes
SHA-256: f53ae9c6d27f1f2ff2fe85f0f3670e54244abd27bb731e534560d49fc21287b7