Malicious PDF — malware analysis report

Static analysis result for SHA-256 e77bd77374afb99f…

MALICIOUS

PDF

123.0 KB Created: 2021-06-04 22:52:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 32b7d72161eae7db6753af25868c8dba SHA-1: d7dd9d38ff87ee76bda1e0b2308012365bd86222 SHA-256: e77bd77374afb99fcab4d81a754944e66619680a21bd3fe453982fb4a6b381db
134 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains an external URI pointing to 'philabc.ru', which is likely the malicious destination. The heuristic 'SE_URGENCY_LURE' suggests the document uses urgent language to prompt user interaction, a common phishing tactic.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • 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://philabc.ru/pbw?utm_term=disequilibrium+in+balance+of+payment+pdf PDF link annotation
    • https://seperabe.weebly.com/uploads/1/3/4/7/134714478/3529960.pdfIn PDF document text
    • https://sinuvuliwazima.weebly.com/uploads/1/3/1/8/131871572/wesusobe.pdfIn PDF document text
    • https://tesokumerapaj.weebly.com/uploads/1/3/4/5/134522001/tinosunijati.pdfIn PDF document text
    • https://gisoxesasolide.weebly.com/uploads/1/3/4/5/134590405/xolusuxeri-rubugilokosame-kepamalowatikuv-suzipokesosi.pdfIn PDF document text
    • https://likudone.weebly.com/uploads/1/3/4/6/134681098/fotinivisutefox_xojazewosojo_lemunutawujegik.pdfIn PDF document text
    • https://tumonejaw.weebly.com/uploads/1/3/6/0/136086042/pevavobabo-zefififipe-pumiboxuvusat.pdfIn PDF document text
    • https://buvujufa.weebly.com/uploads/1/3/1/3/131379824/e0920e1a6a510.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/84a8ae27-7dde-432a-8ba6-b9611fdfaf86/zakegem.pdfIn PDF document text
    • http://kelivesas.pbworks.com/f/51919358450.pdfIn PDF document text
    • http://tukufidanega.pbworks.com/f/lanogubolosetugaditivor.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f2010fbc-e572-451a-a6bb-0d02a05802ff/81512404806.pdfIn PDF document text
    • http://wiwudoje.pbworks.com/w/file/fetch/144536706/how_to_reset_a_kenmore_high_efficiency_washer.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3f4ed204-14cf-427c-9222-ca29c6977051/kutupegodapado.pdfIn PDF document text
    • http://lipadune.pbworks.com/w/file/fetch/144624021/zamujinatijekasozivir.pdfIn PDF document text
    • http://jifesepapo.pbworks.com/f/preguntas_y_respuestas_del_cuento_el_crimen_casi_perfecto.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5c5b7b3c-4c8b-4412-ae8c-562e2be6a8f5/bixufajoxamiraxo.pdfIn PDF document text
    • http://risuxujuvu.pbworks.com/w/file/fetch/144519468/60214448755.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/619565af-789c-4b68-9621-3a282042b3af/gogobubufiwuxizarozoto.pdfIn PDF document text
    • http://noxiwako.pbworks.com/f/murasutobanopifodumir.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4d893989-f070-43e3-b2fb-a550116d1b78/petsafe_deluxe_bark_control_collar_reviews.pdfIn PDF document text
    • http://padimagofo.pbworks.com/w/file/fetch/144595641/60424531577.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_off0001a118.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1A118 5668 bytes
SHA-256: 9f09212ddba61040a6406378af9c60b9fa3878106888409765bf6c88c005cb83
font_01_sfnt_off0001b44f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1B44F 12860 bytes
SHA-256: 98bc922f6d77e04c85e5da7e4e2d87ca85d4122b4d181c21c5c9431a828b1985