Malicious PDF — malware analysis report

Static analysis result for SHA-256 96d6e710cfb79ecb…

MALICIOUS

PDF

76.5 KB Created: 2021-02-12 19:21:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: b647f2f4adfbee161c9fc0f0f963b589 SHA-1: b83d12c444f2c1f4a0eae73be10fbc87d2ea6e88 SHA-256: 96d6e710cfb79ecb8e069730931261a28f03847452d46ea7ee1d751947009fc1
126 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs pointing to disposable domains and link farms, indicating a phishing or malware distribution attempt. The document body, though heavily obfuscated, suggests a lure related to a 'repair manual'. No scripts were extracted, but the presence of multiple external URIs suggests the document's primary purpose is to redirect the user to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • 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://jottigo.ru/wix?keyword=scag+freedom+z+repair+manual PDF link annotation
    • https://jewepixixa.weebly.com/uploads/1/3/0/8/130814248/tupow_roridozovo.pdfIn PDF document text
    • https://cdn.sqhk.co/kagixepo/i4LYR9z/weather_forecast_for_today.pdfIn PDF document text
    • https://cdn.sqhk.co/pevejotomoma/isPjfM4/18884786723.pdfIn PDF document text
    • https://runogobikekeg.weebly.com/uploads/1/3/5/3/135350887/446f74955.pdfIn PDF document text
    • https://cdn.sqhk.co/xederebat/VgjgeCg/rifudeborewixir.pdfIn PDF document text
    • https://cdn.sqhk.co/velizovatim/phdhdie/hmrc_tax_return_notes_2020.pdfIn PDF document text
    • https://dejalujufoleto.weebly.com/uploads/1/3/1/3/131378776/sasane_dalofewosi.pdfIn PDF document text
    • https://cdn.sqhk.co/zopimoforaja/ejghhgc/walking_dead_movie_trailer_2019.pdfIn PDF document text
    • https://cdn.sqhk.co/mezugifosa/MAjb2je/jipofewomologarepubusuxa.pdfIn PDF document text
    • http://romabeveseruzor.22web.org/alpha_blondy_cocody_rock_free.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
    • http://sinipuxi.epizy.com/lifobetibalaputegikaw.pdfIn PDF document text
    • https://s3.amazonaws.com/wibedubosateg/nuxibofokobisujoxano.pdfIn PDF document text
    • http://xeziribosivamis.epizy.com/setiruvazabekifitamunuj.pdfIn PDF document text
    • https://s3.amazonaws.com/muvazi/muletujowinuvaxazaxosavi.pdfIn PDF document text
    • http://lozepis.epizy.com/34095443198.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_off0000d82b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD82B 5252 bytes
SHA-256: 93d70e64d8ff35ddcfd68035370bfe623e5d01afe80724e16472f29ce8973dd4
font_01_sfnt_off0000e9e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9E1 14012 bytes
SHA-256: c55ad7cbb051a3831d1dc8ee54a70d590b5ed4a735d146b290f0f5179952a870
font_02_sfnt_off0001169e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1169E 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

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