Malicious PDF — malware analysis report

Static analysis result for SHA-256 e3d31702bbed2730…

MALICIOUS

PDF

76.7 KB Created: 2021-04-03 12:04:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: d9469ad7bc174ae9139e68af9053cb8e SHA-1: 30000670b332365e7b4a7a0ea1625fb8c6b3f489 SHA-256: e3d31702bbed2730e2393a0dc5ad5b8540024de38805f579b73768f323c4f731
194 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or malware distribution attempt. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm designed to redirect users to malicious content. The presence of urgency lures further supports a phishing or scam objective.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 7

  • 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.
  • 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://botokaw.ru/123?utm_term=fetal+development+chart+pdf PDF link annotation
    • https://risegexof.weebly.com/uploads/1/3/4/6/134661868/7c9d8.pdfIn PDF document text
    • https://wosobariwosamu.weebly.com/uploads/1/3/4/3/134372044/6f18602232.pdfIn PDF document text
    • https://vetasokimatajed.weebly.com/uploads/1/3/5/2/135296406/4187895.pdfIn PDF document text
    • https://voxivunesiru.weebly.com/uploads/1/3/1/4/131407918/5701309.pdfIn PDF document text
    • https://jubibesu.weebly.com/uploads/1/3/1/3/131379113/2783625.pdfIn PDF document text
    • https://cdn.sqhk.co/migixurej/eheFzgj/romesekituxuvaz.pdfIn PDF document text
    • https://cdn.sqhk.co/dalubevemex/hjzlNw5/my_taxi_contact_number_cork.pdfIn PDF document text
    • https://cdn.sqhk.co/xajamenujo/d1Chejj/us_army_stickman_rope_hero.pdfIn PDF document text
    • https://cdn.sqhk.co/vezubusevof/GOhbahi/tidinus.pdfIn PDF document text
    • https://sofamilases.weebly.com/uploads/1/3/5/4/135401016/rulikomafoko.pdfIn PDF document text
    • https://guxojifupu.weebly.com/uploads/1/3/1/4/131438233/541091.pdfIn PDF document text
    • https://nepexinis.weebly.com/uploads/1/3/1/4/131438592/puvowerefujijux.pdfIn PDF document text
    • https://tivufotevomok.weebly.com/uploads/1/3/2/6/132682035/2225914.pdfIn PDF document text
    • https://wavujosivisero.weebly.com/uploads/1/3/2/7/132740585/povudaj-foxigusi-jijujidizij.pdfIn PDF document text
    • https://cdn.sqhk.co/petebeki/iia6geo/little_boy_fade_haircuts_2017.pdfIn PDF document text
    • https://cdn.sqhk.co/zurefaxenov/djhLE2U/zawuzadogutipadaxuk.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://dawovizi.epizy.com/23683514005.pdfIn PDF document text
    • http://vafogowuzelugud.epizy.com/download_new_school_physics_textbook_for_secondary_school.pdfIn PDF document text
    • http://nogomazarem.epizy.com/how_to_connect_yamaha_to_tv.pdfIn PDF document text
    • http://gipujusabobax.rf.gd/ap_lit_multiple_choice_practice_questions.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_off0000f0b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0B0 5232 bytes
SHA-256: 92795b5a4692ebabdae5a9066df234f53ecaf5c74bd0bd4a51f021d32d6420b6
font_01_sfnt_off00010261.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10261 10344 bytes
SHA-256: 271f202c3ffb204cad2bbb43cde7fb9c2c5f4e67fd89d5d2c02a5e21fdc8cee1