Malicious PDF — malware analysis report

Static analysis result for SHA-256 18e3e62b4868391d…

MALICIOUS

PDF

96.6 KB Created: 2021-04-03 08:53:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: fb6fa7ca1339325fecdfbf274b7d8993 SHA-1: 713354976c5af1b332be7d97e8b584cf558af1ee SHA-256: 18e3e62b4868391d4c3e0f0e9beaf07ddd83e14c7ead1f1b0cca928bb7351934
134 Risk Score

Malware Insights

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

The PDF document contains numerous external links, many hosted on disposable domains, and is flagged by ML classifiers and ClamAV as malicious. The document body, though heavily obfuscated, appears to be a lure related to financial trading, likely intended to trick users into clicking malicious links. The presence of multiple PDF_SEO_DISPOSABLE_LINK_FARM heuristics further supports the malicious intent of distributing content through a link farm.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://botokaw.ru/strik?utm_term=how+to+trade+in+currency+in+zerodha PDF link annotation
    • http://creditscorefix.info/211387071551088o.pdfIn PDF document text
    • http://lnstagram-copyright-confirms.com/accelerated_piano_adventures_book_1kxzb0.pdfIn PDF document text
    • http://securespot.ru/21435455595pdbbk.pdfIn PDF document text
    • http://dreamingdeveloper.com/tefal_oleoclean_deep_fryer_with_oil_filtration__storagev4wz6.pdfIn PDF document text
    • http://netewe9.xyz/8355555281185o8p.pdfIn PDF document text
    • http://capridigi.com/cognitive_bias_codexkmw1x.pdfIn PDF document text
    • http://witexodegimo.iblogger.org/hunger_games_1_libro_italiano.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4475995/normal_605845a555e01.pdfIn PDF document text
    • http://legegapepapo.medianewsonline.com/leligegajoguvosewobike.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368495/normal_5ff6279923d87.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4491153/normal_6017424297517.pdfIn PDF document text
    • http://fafikup.scienceontheweb.net/65381064116.pdfIn PDF document text
    • http://begemot.space/sandisk_sansa_clip_4gb_firmwareg4b1i.pdfIn PDF document text
    • http://zubudiru.sportsontheweb.net/atharvashirsha_meaning_in_marathi.pdfIn PDF document text
    • http://pressit.space/rewigefaler9j3p4.pdfIn PDF document text
    • http://kavelizopepi.mywebcommunity.org/sunoredodemipuzanigegewub.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379233/normal_6028ee7cecd56.pdfIn PDF document text
    • http://floradoma.net/always_on_display_vivosziva.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://dinonikof.epizy.com/luxofojujumara.pdfIn PDF document text
    • http://nebejobibaveb.epizy.com/74080402707.pdfIn PDF document text
    • https://ec08fec6-e576-400d-8504-372613838d3c.filesusr.com/ugd/57e0ce_a72eeb0ab9d749ca9ed91e907ac528da.pdf?index=trueIn PDF document text
    • https://86a9da1b-0b57-4b35-a77a-523886b904cd.filesusr.com/ugd/0d9a50_1bc50b2635e140e48a58172a23c1573d.pdf?index=trueIn PDF document text
    • https://6a1e2a5f-c456-4288-b9d5-5378f87870fb.filesusr.com/ugd/076fac_c1a1b937b6764ddca6c1f2ad923fadd3.pdf?index=trueIn PDF document text
    • http://xigibisas.rf.gd/paises_que_conforman_africa_oriental.pdfIn PDF document text
    • https://bf6af823-cb0d-4ee8-9d5b-4f0b1de5ed24.filesusr.com/ugd/9eb187_65184859367f4e079966f76493ab3add.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_off00013968.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13968 5024 bytes
SHA-256: 549803ef6959d1be1ff2913f57b9e98b4b633975cbd1ec13e14e59a1ebd4fea0
font_01_sfnt_off00014a93.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14A93 11828 bytes
SHA-256: 0d2eacf8e593e09c834c734f917bb594acba2498a74114ef6f0e792ed6d8416f