Malicious PDF — malware analysis report

Static analysis result for SHA-256 92b38ebb8330b9dd…

MALICIOUS

PDF

70.8 KB Created: 2021-03-08 06:40:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-29
MD5: 64d12019564ddbc288dbbf8a14873677 SHA-1: e008ff409159d7b9e3f026eaef60e6944b6fa583 SHA-256: 92b38ebb8330b9dd403d3518eb3cb82b223458679ace8e787ee0d765b75941be
134 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including a high-confidence ML classifier and ClamAV, indicating malicious intent. It contains numerous external URIs, with one prominent URL pointing to a suspicious domain, likely serving as a lure for phishing or malware distribution. The presence of embedded JavaScript, though not fully detailed, suggests potential for further malicious actions like downloading second-stage payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • 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://xezojetit.ru/strik?utm_term=city+of+bones+tv+tie+in PDF link annotation
    • https://romugazasemagop.weebly.com/uploads/1/3/4/8/134897733/wokezala.pdfIn PDF document text
    • http://itagreen.fun/my_logitech_wireless_keyboard_is_not_working_properlygaasg.pdfIn PDF document text
    • http://sentytld.online/altec_lansing_vs24215xf19.pdfIn PDF document text
    • http://fastgetme.online/wake_surfing_mastercraft_prostar_190bowcp.pdfIn PDF document text
    • https://fofavaduk.weebly.com/uploads/1/3/4/4/134436242/5980990.pdfIn PDF document text
    • https://jinafoxibufesow.weebly.com/uploads/1/3/5/2/135293268/povezofunizapibabe.pdfIn PDF document text
    • http://avit0.pro/ribugalazedokuxiefm1o.pdfIn PDF document text
    • http://svoydvalend.xyz/subacromial_bursitis_treatment_guidelinesfwt1y.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/63b7cf1b-b625-4cb0-aaa5-da3d38d9adf7/ryobi_one_chainsaw_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/vavapekadoliti/what_type_of_battery_for_a_g_shock_watch.pdfIn PDF document text
    • http://gegumapobok.rf.gd/25262400085.pdfIn PDF document text
    • https://s3.amazonaws.com/vasofirida/muvapaxetunugoseb.pdfIn PDF document text
    • http://wixufoliwesomep.epizy.com/jaynes_2003_probability_theory.pdfIn PDF document text
    • https://s3.amazonaws.com/dotivaf/20381632180.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5b836321-35fe-4f1c-bde4-94411f729365/monstrous_races_2_5e.pdfIn PDF document text
    • http://vogepaxita.rf.gd/kosenafakowetagobegekeker.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/45438392-9e17-45c6-8881-b21cfdfe025e/jemudujuloso.pdfIn PDF document text
    • https://s3.amazonaws.com/bivanud/countries_involved_in_ww2_94_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/861e579a-0fde-4ea7-81ad-0fa45dafe0aa/song_of_solomon_chapter_13.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_off0000d8d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8D0 4632 bytes
SHA-256: b826b1b6e49b8acc0f36318795edab7508462ecdf2cbb876eca87b521fdf0aa7
font_01_sfnt_off0000e8ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8BA 11596 bytes
SHA-256: a937696b3b9264b1e4c630bd6029617feb97196bddd7add84659a2131a4b0995

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