Malicious PDF — malware analysis report

Static analysis result for SHA-256 1dd0dd5431514d8b…

MALICIOUS

PDF

84.8 KB Created: 2021-03-24 01:36:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: 13f0788e9d4b1143ca7b5fcf4499509b SHA-1: a2e9de01183615610085ba1f91543a3e693df50c SHA-256: 1dd0dd5431514d8bcb3b3c47f3a0a2e80b75efd2bfa0eaa31ebb600964d6ba30
186 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection and an ML classifier. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm or SEO spam operation. One of the embedded URLs, https://xezojetit.ru/wix?keyword=evertale+guide+training+dojo+13, is likely part of this malicious infrastructure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • 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 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://xezojetit.ru/wix?keyword=evertale+guide+training+dojo+13 PDF link annotation
    • https://gugivubur.weebly.com/uploads/1/3/4/3/134390132/6654418.pdfIn PDF document text
    • https://xumotisububilup.weebly.com/uploads/1/3/4/5/134591263/8bbb4c7.pdfIn PDF document text
    • https://bujefodamefizup.weebly.com/uploads/1/3/1/0/131070612/gefaw.pdfIn PDF document text
    • https://wenojobopowegit.weebly.com/uploads/1/3/4/8/134879608/c9b61ea02b520.pdfIn PDF document text
    • https://cdn.sqhk.co/xopuxuvop/GGgjiam/magic_cup_ice_cream_near_me.pdfIn PDF document text
    • http://tavaxibewoposo.iblogger.org/top_10_reader_app_for_android.pdfIn PDF document text
    • https://fazodokivev.weebly.com/uploads/1/3/4/0/134018208/wegofi-faxun-lijelanijit.pdfIn PDF document text
    • https://cdn.sqhk.co/wiwokosokif/dSrJjj7/10219627718.pdfIn PDF document text
    • https://lilofuzaxodas.weebly.com/uploads/1/3/0/7/130775659/4b538.pdfIn PDF document text
    • https://zogosozel.weebly.com/uploads/1/3/1/4/131406999/e10a41.pdfIn PDF document text
    • https://cdn.sqhk.co/fofotixoz/rieHgfc/xapuwuxoxomu.pdfIn PDF document text
    • https://dokakuzod.weebly.com/uploads/1/3/4/8/134884054/2969280.pdfIn PDF document text
    • https://pafabori.weebly.com/uploads/1/3/5/3/135317136/milox.pdfIn PDF document text
    • https://cdn.sqhk.co/jokufemij/onxLgdO/monster_hunter_clicker_rpg_idle_game.pdfIn PDF document text
    • https://cdn.sqhk.co/pawekenu/gdheF60/37994503784.pdfIn PDF document text
    • https://kasasifu.weebly.com/uploads/1/3/4/6/134697732/lorejimozak.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://rirazito.epizy.com/what_is_inductive_approach_in_qualitative_research.pdfIn PDF document text
    • https://3d5b2cfc-74f5-4c02-8466-0d369b02955c.filesusr.com/ugd/69b86f_53026efbaafa46fb95122e21a58ce2b7.pdf?index=trueIn PDF document text
    • http://vojalaranugun.epizy.com/htc_one_m8_charger_port_replacement.pdfIn PDF document text
    • https://728bf1be-24e3-4891-ba98-fedceca1a503.filesusr.com/ugd/3268c8_b78951a09514418cbf4dde3590b27a35.pdf?index=trueIn PDF document text
    • http://vezufokat.rf.gd/paypal_app_pending.pdfIn PDF document text
    • https://3ea853e4-7f2b-4fb0-9229-b04907a1e321.filesusr.com/ugd/d94095_e07a306f608b46389a65f50fa0a263f8.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_off00010b49.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B49 5124 bytes
SHA-256: 0b2a64f116ea8d518b7c3a2e9cb0ed3567b3e6d75bb0089d736b7671097a92cb
font_01_sfnt_off00011ce1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11CE1 12596 bytes
SHA-256: fe216e3a9897ba9f7d82f40401cf7e41a3fa207b73f23492fdca1cab29eb17c1