Malicious PDF — malware analysis report

Static analysis result for SHA-256 93cbb8d75ab1acdb…

MALICIOUS

PDF

81.5 KB Created: 2021-03-22 02:03:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: 91be1f9d7f1e773e57d79b79abf797ff SHA-1: 1e1c384209ef6aa628949eeed0710d4f1144dc70 SHA-256: 93cbb8d75ab1acdbba9edf5f3cd5e641b85263083ea2a2f9097e2e887303d4be
194 Risk Score

Malware Insights

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

The PDF contains a large number of external links pointing to disposable domains, indicative of a link farm designed to host malicious content or phishing pages. The ML classifier and ClamAV detection strongly suggest malicious intent. Although no scripts were directly extracted, the PDF structure and numerous external URLs are consistent with a phishing or malware distribution lure, likely delivered via spearphishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://mezovuduw.ru/wix?keyword=versa+watch+winder+manual PDF link annotation
    • http://carluxepaint.site/wijujoletogafha9mt.pdfIn PDF document text
    • http://lovelyhouse.online/6079525155979807.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4409806/normal_6005ff504df25.pdfIn PDF document text
    • http://zutelotojenexop.getenjoyment.net/57349486882.pdfIn PDF document text
    • http://kuworekokinig.medianewsonline.com/pakexosovumiruturot.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4501980/normal_60401b3437237.pdfIn PDF document text
    • https://kuzosilu.weebly.com/uploads/1/3/2/8/132815793/dozafovapagavi_xojovuviwisut.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4473616/normal_60515ea7415dc.pdfIn PDF document text
    • http://ita-bio.fun/funny_video_song_download_for_whatsapp_statusmfe2f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464873/normal_601554f55799a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378853/normal_5fd8cb353d975.pdfIn PDF document text
    • http://jukojadijomefar.medianewsonline.com/secant_angles_worksheet_answers.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4418570/normal_5ff5511c28170.pdfIn PDF document text
    • https://wevikafajaxa.weebly.com/uploads/1/3/1/1/131164556/rewaremotaxivo.pdfIn PDF document text
    • http://tublitalia.space/introduction_to_computer_programming_booksiia9.pdfIn PDF document text
    • https://fuwexizadosilu.weebly.com/uploads/1/3/5/3/135318643/7016693.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416939/normal_60498a6d586c6.pdfIn PDF document text
    • https://zugasunisozabij.weebly.com/uploads/1/3/4/7/134759734/jisajogepovoza.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4456984/normal_601789abb1f59.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4501998/normal_6015c7f202c00.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/xufujofaleki/japep.pdfIn PDF document text
    • https://s3.amazonaws.com/vaxebisapesi/warriors_dont_cry_online_book.pdfIn PDF document text
    • http://lutepotazor.onlinewebshop.net/paregoturizawamaf.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f387.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF387 5008 bytes
SHA-256: 2e40405c85236585b102cbdab2fbe6ff012911d97cbfe2de7612727f76a54963
font_01_sfnt_off00010466.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10466 11240 bytes
SHA-256: 77c5b965809d8b09e5dd4fedcce50a7c86fd24df9fcaadbcf13c7c8a7beeb16a
font_02_sfnt_off00012ac6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12AC6 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e