Malicious PDF — malware analysis report

Static analysis result for SHA-256 0e9d743894a49bff…

MALICIOUS

PDF

72.2 KB Created: 2021-03-23 22:25:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 923521af194f6d0fb00b93b2522cb6d2 SHA-1: 85e43081045516e29b15e082413f6df7d7dd487f SHA-256: 0e9d743894a49bff6657c1dab7d57585660cf57427e50bf50531d9c350ada3bd
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains a large number of external links, many pointing to disposable hosting, suggesting a link farm designed to distribute malware or phish users. The document body, though heavily corrupted, contains keywords related to game cheats, likely serving as a lure to attract victims to click on the embedded malicious URLs.

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 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.
  • 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://xajibur.ru/wix?keyword=sift+heads+world+act+2+hacked+cheats PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4368497/normal_60263feb9a59e.pdfIn PDF document text
    • https://cdn.sqhk.co/dikarulik/gik1sja/79269925127.pdfIn PDF document text
    • https://cdn.sqhk.co/dutigimomana/2ia6gfI/31035623726.pdfIn PDF document text
    • https://cdn.sqhk.co/xuwadezab/geicHjd/free_slot_games_online_no_registration.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377663/normal_6039845857fab.pdfIn PDF document text
    • https://cdn.sqhk.co/zijikunu/oLhij6b/elemental_dungeon_mod_apk_hack.pdfIn PDF document text
    • http://lefibipefazefep.mypressonline.com/fuvuluwi.pdfIn PDF document text
    • https://cdn.sqhk.co/tujarazimok/gj8zgiu/bain_insights_retail.pdfIn PDF document text
    • http://jedilinosur.mywebcommunity.org/hp_photosmart_d110_series_driver_windows_7_64_bit.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4474211/normal_602977f45174a.pdfIn PDF document text
    • http://dokusamatofapig.iblogger.org/hewlett_packard_10bii_calculator.pdfIn PDF document text
    • http://pifesato.iblogger.org/69949650291.pdfIn PDF document text
    • https://cdn.sqhk.co/woledibiroju/0ogdngj/pilomatrixoma_ultrasound_images.pdfIn PDF document text
    • https://cdn.sqhk.co/vemetafije/4GE4Hjh/goodwill_online_auction_columbus_ohio.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://3465328d-eb21-4af5-a94e-b8fdacefaafa.filesusr.com/ugd/c63bf9_1cddce62c3b74ca691a0be16c260de3b.pdf?index=trueIn PDF document text
    • https://0dc5016f-38c0-4e11-84f4-4717e3ef4ec7.filesusr.com/ugd/4fd84c_1eaf0ad7a89c41ba80158f6941d9c90b.pdf?index=trueIn 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_off0000dab1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDAB1 5500 bytes
SHA-256: 3974923dbedb52bc2e18c0cd0c7b5d3810ca4c75761d4805c5ddec161f9e463d
font_01_sfnt_off0000ed78.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED78 11588 bytes
SHA-256: 098e043585b1f3e36b6c7d9ef4eb72e262bddde9754df3b9cf783bb413b24d22

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