Malicious PDF — malware analysis report

Static analysis result for SHA-256 b7a1820da84d86dc…

MALICIOUS

PDF

76.1 KB Created: 2021-02-03 16:50:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 17f5db9c8436b6e6968af3e4c139f2cd SHA-1: e2083d27bb5824368bb21d32e43eeb5d2a1beb06 SHA-256: b7a1820da84d86dc80317af3325fa03083bfdf5027f80159f077afaf69dd529f
156 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including PDF_SEO_LINK_FARM and ML_NYX_PDF_MALICIOUS, indicating a high likelihood of malicious intent. It contains numerous external links, with one prominent example being a link farm hosted on seumenha.ru. The ClamAV detection further supports its malicious classification as Pdf.Phishing.Trojan. The document body is heavily obfuscated, but the presence of external links suggests a phishing or malicious redirection attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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 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.
  • 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://seumenha.ru/123?utm_term=disabled+adaptations+to+homes PDF link annotation
    • https://cdn.sqhk.co/govazofaj/jjhggdt/limbo_prime_systems_price_ps4.pdfIn PDF document text
    • https://cdn.sqhk.co/winelolibug/ifjhiif/mimasobuwilabovukekef.pdfIn PDF document text
    • https://dapinolun.weebly.com/uploads/1/3/4/7/134762022/kaluwamexidamemi.pdfIn PDF document text
    • https://cdn.sqhk.co/wiwuwigo/Wjdnln6/13283525808.pdfIn PDF document text
    • https://togezajotutev.weebly.com/uploads/1/3/0/8/130874352/tuwudusexukisig.pdfIn PDF document text
    • https://cdn.sqhk.co/xogeloke/NhjhbQE/sad_sticker_whatsapp_dp.pdfIn PDF document text
    • https://cdn.sqhk.co/madumubo/cj8hajj/gepenutumif.pdfIn PDF document text
    • https://pipedexow.weebly.com/uploads/1/3/4/8/134852679/sesopam.pdfIn PDF document text
    • https://lifexusubanipi.weebly.com/uploads/1/3/4/3/134377686/mezudoferoniteni.pdfIn PDF document text
    • https://wivixape.weebly.com/uploads/1/3/4/8/134897282/wedokaw.pdfIn PDF document text
    • https://nawopudupavipe.weebly.com/uploads/1/3/4/8/134856820/7466177.pdfIn PDF document text
    • https://bodujifoji.weebly.com/uploads/1/3/5/3/135394102/dazobog.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/jemazejodep/1699025263.pdfIn PDF document text
    • https://s3.amazonaws.com/wegugus/sopuzeliditug.pdfIn PDF document text
    • https://s3.amazonaws.com/xulepiwa/6314731288.pdfIn PDF document text
    • https://s3.amazonaws.com/tokit/2014_charger_srt8_performance_parts.pdfIn PDF document text
    • https://s3.amazonaws.com/zemigiduwagafu/edhesive_1._4_code_practice_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/busutafitufe/kaiami_swim_size_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/mulerux/jexalafadawajigaw.pdfIn PDF document text
    • https://s3.amazonaws.com/dorulusof/aluminium_sheets_for_sale_south_africa.pdfIn PDF document text
    • https://s3.amazonaws.com/fonazuzixagizir/automation_anywhere_tool_interview_questions_and_answers.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_off0000ecec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECEC 5244 bytes
SHA-256: 143dd3972522efbaf58b062d1e7a9e8b2ee9abdc84e8e49e041b433d1cf04535
font_01_sfnt_off0000fe97.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE97 10572 bytes
SHA-256: b9851e4e166b84d3531d9445bc08b01a471ddf554b4263765e12850e7731ed26

Open this report in the interactive analyzer, or submit your own file for analysis.