Malicious PDF — malware analysis report

Static analysis result for SHA-256 a92f7aeb329854c6…

MALICIOUS

PDF

103.0 KB Created: 2021-03-08 21:29:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 62774f116b62c17eca97398488580169 SHA-1: 9970e30f6a8c1914bcd4f5bcde6c18a4b37fe808 SHA-256: a92f7aeb329854c639c18d38ac1681fe584baaf21399fa3a2fde662174eee40f
126 Risk Score

Malware Insights

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

The PDF contains multiple external URIs and is flagged by ClamAV as Pdf.Phishing.Trojan. The ML classifier also strongly indicates maliciousness. The document body, though partially corrupted, suggests a lure related to 'First global robotics 2020', directing users to potentially malicious domains like seumenha.ru.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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 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://seumenha.ru/wix?keyword=first+global+robotics+2020 PDF link annotation
    • http://grusha.space/81228799617iwqnz.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4456128/normal_602b0cec21fde.pdfIn PDF document text
    • https://cdn.sqhk.co/jotenitix/eShbjja/piano_music_definition_history.pdfIn PDF document text
    • https://buvelixajotoneb.weebly.com/uploads/1/3/5/9/135982000/nufezozevojid-reruvupiwi-wofifikez-jadupisa.pdfIn PDF document text
    • http://milanomoda.site/faxulijari1qi3a.pdfIn PDF document text
    • http://characduwe.space/2001_honda_rancher_350_4x4_top_speed79nnk.pdfIn PDF document text
    • http://muldwych.com/miwawoxugekewosutuxamv8i.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4496015/normal_5fda1b29613d2.pdfIn PDF document text
    • https://fewebiporunivag.weebly.com/uploads/1/3/0/7/130775920/2127828.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4487191/normal_5fd0a21087ff0.pdfIn PDF document text
    • https://zifimegepero.weebly.com/uploads/1/3/4/6/134601706/5101592.pdfIn PDF document text
    • https://lobusuzagoti.weebly.com/uploads/1/3/4/4/134470260/lavulakisetap.pdfIn PDF document text
    • https://cdn.sqhk.co/zifuvifiweva/RyjdMMH/t_mobile_phone_number_change.pdfIn PDF document text
    • https://cdn.sqhk.co/lovojekaboxi/AyMjgmO/78530489626.pdfIn PDF document text
    • https://lelopotive.weebly.com/uploads/1/3/0/7/130738546/6016488.pdfIn PDF document text
    • https://dujolisinapujis.weebly.com/uploads/1/3/4/3/134328324/padopesodaz.pdfIn PDF document text
    • https://memudodonimik.weebly.com/uploads/1/3/1/4/131406547/gexegeminalabowodis.pdfIn PDF document text
    • https://cdn.sqhk.co/wizokawoxo/flkvvjf/looper_imdb_parents_guide.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/jasipefulaxiduj/52487765819.pdfIn PDF document text
    • https://s3.amazonaws.com/befarekogol/gerbera_daisy_paper_flower_template.pdfIn PDF document text
    • https://s3.amazonaws.com/jobavo/3285949890.pdfIn PDF document text
    • https://s3.amazonaws.com/bomupi/bhola_bhandari_ringtone_mp4.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_off000149ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x149EA 5336 bytes
SHA-256: 00a6af7ae67bae3efbe8dbc3a3eb95b608e38a89d454f515aeb9e986c146c15a
font_01_sfnt_off00015c20.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15C20 16352 bytes
SHA-256: 8ed6b05280659c4dc1609ce127c966e85a0ea6cf4b85d8e4bf125a00c828b2b6

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