Malicious PDF — malware analysis report

Static analysis result for SHA-256 98e6fc763bca4a38…

MALICIOUS

PDF

83.8 KB Created: 2021-03-08 06:04:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-03
MD5: 08b80dd936f500021956cc6f81c80682 SHA-1: 580f1adc97caa2d1f24697d3f16e6654ed1de612 SHA-256: 98e6fc763bca4a385ac87e822e7f5028d56427ccbdc7b6275fedd5ee930c2d6c
126 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs, with one prominent URL pointing to a suspicious domain ('botokaw.ru') that is likely part of a phishing or malicious content delivery scheme. The ML classifier and ClamAV detection strongly indicate malicious intent, classifying it as a phishing trojan. The document body, though heavily obfuscated, contains references to 'Lexus is 300 2jz swap' and 'wkhtmltopdf', suggesting a lure to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://botokaw.ru/strik?utm_term=lexus+is+300+2jz+swap PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4387421/normal_600bfd33ebcf9.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4467273/normal_5fc93b3153fc1.pdfIn PDF document text
    • https://cdn.sqhk.co/dagozuwemep/dibhjia/fogoxilapubunon.pdfIn PDF document text
    • https://cdn.sqhk.co/rifebonapesi/Ghfa6hi/1480744599.pdfIn PDF document text
    • https://cdn.sqhk.co/waxobakal/URBgi3m/champions_hockey_league_winner.pdfIn PDF document text
    • http://naxovonukile.iblogger.org/cuidados_de_enfermeria_para_la_administracion_de_medicamentos_por_via_rectal.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4406775/normal_601ec81778571.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/rolefosiju/model_answer_meaning_in_english.pdfIn PDF document text
    • https://97d49ff2-d914-4ae4-8ac8-5e5cf5f77cad.filesusr.com/ugd/6350c7_c4a7192704d14ab0b32127cf6c4cca6e.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/jipowumat/gegudibamazojoxivebuxofi.pdfIn PDF document text
    • http://patemud.epizy.com/46537081315.pdfIn PDF document text
    • http://pejefovad.epizy.com/we_cordially_invite_you_template.pdfIn PDF document text
    • http://tebuwawezizafes.onlinewebshop.net/27706693861.pdfIn PDF document text
    • http://gidovofivoj.epizy.com/59940910476.pdfIn PDF document text
    • https://65d0a56f-4074-4e8f-9acc-29e6f8e8f663.filesusr.com/ugd/37655d_034d7d859228433cb89bdf50a501917f.pdf?index=trueIn PDF document text
    • http://kozogasivufi.myartsonline.com/wusus.pdfIn PDF document text
    • https://3b0fe5ff-7f86-489c-8138-fc984e51136c.filesusr.com/ugd/bfd78a_98743226da974b1f85c1a541ce163ed1.pdf?index=trueIn PDF document text
    • http://fugexumelelada.rf.gd/30_day_diabetes_cure_recipes.pdfIn PDF document text
    • https://bd7a0a6f-bbfd-49cc-ba41-c3f2778102d9.filesusr.com/ugd/9ea91e_8d26e554825949cf9a1a2369f87bb30d.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/fadedosi/89362286341.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000106e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106E1 5352 bytes
SHA-256: e1b6b50e6dc2a2e32ec0ca6f6521d173b43c61e253cbe539e45d461dee13415e
font_01_sfnt_off0001194e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1194E 12080 bytes
SHA-256: 6e353c139033d8b46edc17ee8761c869666179a840d6a2ae6c17de5ac0af7bd8

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