Malicious PDF — malware analysis report

Static analysis result for SHA-256 9c4616d7f7860022…

MALICIOUS

PDF

81.6 KB Created: 2021-02-24 09:17:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 5be8d4056822ef973df39c4083e0af56 SHA-1: b1cc0aae4214fc34f869a7acb113c0f53e932087 SHA-256: 9c4616d7f7860022334972c4bfccda7b8b90378e1f0c401e263a33e39c81971e
126 Risk Score

Malware Insights

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

The PDF contains multiple heuristics indicating it is a link farm and a phishing lure, with a high ML score and ClamAV detection confirming maliciousness. The embedded URL 'https://maypoin.ru/aws?utm_term=dream+story+arthur+schnitzler+pdf' suggests a phishing attempt disguised as a search result. While no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with malicious document delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 5

  • 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.
  • 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://maypoin.ru/aws?utm_term=dream+story+arthur+schnitzler+pdf PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4470689/normal_5fffa352cb8ca.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4428342/normal_5fe702dd67b92.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4471723/normal_6019338e03f2e.pdfIn PDF document text
    • http://uuuuull.space/jotenso5yu.pdfIn PDF document text
    • http://idealica-ufficialeitalia.website/acca_f8_lsbf_notes_freel7ob4.pdfIn PDF document text
    • https://leniwexobopusez.weebly.com/uploads/1/3/4/7/134713406/kumire-nafumovilapowu-wudomevikuxu-xafobalav.pdfIn PDF document text
    • http://guxiket.iblogger.org/sony_linear_pcm_recorder_pcm-m10_manual.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412774/normal_602958037557d.pdfIn PDF document text
    • https://mojapilujo.weebly.com/uploads/1/3/0/9/130969316/2842748.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386837/normal_602d4dd09ccde.pdfIn PDF document text
    • https://mejodedasebedo.weebly.com/uploads/1/3/4/7/134725949/metejo.pdfIn PDF document text
    • http://my-favshopf.online/anti_allergic_drugsqhefs.pdfIn PDF document text
    • http://epipog.com/the_president_speech_today_ghanacqs4y.pdfIn PDF document text
    • https://golotarati.weebly.com/uploads/1/3/1/8/131856611/2155852.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
    • http://gutezapirasawad.rf.gd/52288938223.pdfIn PDF document text
    • http://pusaxedufa.rf.gd/67758876895.pdfIn PDF document text
    • http://navibizo.rf.gd/microsoft_word_training_guide_template.pdfIn PDF document text
    • http://dikuwunoxoxa.epizy.com/what_type_of_questions_are_asked_in_wipro_interview.pdfIn PDF document text
    • http://biforobajimebug.epizy.com/beginner_fitness.pdfIn PDF document text
    • https://s3.amazonaws.com/geraromu/46478977398.pdfIn PDF document text
    • http://lifarodanudu.rf.gd/dixor.pdfIn PDF document text
    • http://virujafaxamer.epizy.com/ssc_chsl_2019_application_form_sarkari_result.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e960.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE960 2864 bytes
SHA-256: 1e45634457d00ffd260f50f45b570b897a08ba439f7acab4ec245255aa5f983d
font_01_sfnt_off0000f391.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF391 5428 bytes
SHA-256: b7c71a0b659a42fee5f3fac48818159b1f45538662cccb0774a70b13fe49910c
font_02_sfnt_off000105f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105F0 10848 bytes
SHA-256: 3d6c71ef0a6b6a78995e9504dddf42f5c7efc93fc3426b10be1f406771894dba
font_03_sfnt_off00012a78.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12A78 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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