Malicious PDF — malware analysis report

Static analysis result for SHA-256 5ba02d4fc71dd235…

MALICIOUS

PDF

76.4 KB Created: 2021-03-07 22:36:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 68643f7d1f39dee48e9d85e14d6219e2 SHA-1: b8f6989b55b53ef0cd0a32a838371ddcd54c421d SHA-256: 5ba02d4fc71dd235269403b1dd5a75433c4612b815cb204309f31f7bde81b993
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 external URIs, including one pointing to 'fokemale.ru' with a query parameter suggesting a search result lure. Another URI, 'puvepum.getenjoyment.net/dudofonevibigekelal.pdf', indicates a link farm hosted on disposable infrastructure, commonly used for distributing malicious content. The document body, though heavily obfuscated, contains text related to replacing an Apple TV remote battery, a common lure for phishing or scam attempts.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://fokemale.ru/strik?utm_term=can+you+replace+apple+tv+remote+battery PDF link annotation
    • http://puvepum.getenjoyment.net/dudofonevibigekelal.pdfIn PDF document text
    • https://cdn.sqhk.co/zekafomaze/qjq8Mhc/sojodotumiso.pdfIn PDF document text
    • https://cdn.sqhk.co/mekekomubun/QStsTjc/rubber_chicken_mask.pdfIn PDF document text
    • https://cdn.sqhk.co/wozejodes/apJqAcM/zodopofimopunifujob.pdfIn PDF document text
    • http://rolivazugatar.scienceontheweb.net/are_sonoma_wineries_open_during_covid.pdfIn PDF document text
    • https://cdn.sqhk.co/sowotewope/eibicgj/3d_pinball_creep_night_download_free.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://borobosen.rf.gd/boating_license_florida_study_guide.pdfIn PDF document text
    • http://kidoputuf.epizy.com/bukifegilebuw.pdfIn PDF document text
    • http://mujedofagogi.epizy.com/toshiba_dvd_video_cassette_recorder_dvr20_manual.pdfIn PDF document text
    • http://xewabilema.epizy.com/twin_bed_platform_frame_plans.pdfIn PDF document text
    • https://s3.amazonaws.com/toliwudalamem/duzofowuwemikegiju.pdfIn PDF document text
    • https://s3.amazonaws.com/genedonapubefe/vasawopufukoxewad.pdfIn PDF document text
    • https://s3.amazonaws.com/gonafoziguwewe/99101628988.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d2e31189-49d5-45f3-8c83-0191f856c29c/model_3_performance_0-60_2.9.pdfIn PDF document text
    • https://s3.amazonaws.com/zibenoroduzuw/remove_local_guide_google_maps.pdfIn PDF document text
    • http://fuvamawijivef.atwebpages.com/ketamab.pdfIn PDF document text
    • http://sofikej.rf.gd/12794058957.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8018c40a-cf7b-4715-ac3e-f073f508fe56/56978424895.pdfIn PDF document text
    • http://desetezovadu.epizy.com/gakugebujowiredapo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/85179444-9c62-419b-9840-e393c5a89be2/nubazogozanofamiva.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_off0000ee02.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE02 5108 bytes
SHA-256: 0035d6cc55f989d0804f6e0b7423bb398b9c4d385c43dbd8b913a5e6c8950ff7
font_01_sfnt_off0000ff55.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF55 10836 bytes
SHA-256: ee35ed66d4653c09137f17f7df4c36e3d01e3f090a5dd0542ff8edd7fac724b5

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