Malicious PDF — malware analysis report

Static analysis result for SHA-256 933303a21b375fba…

MALICIOUS

PDF

69.1 KB Created: 2021-05-06 01:12:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: a5f2ec83fa7f899fd6d3f1bb41f52f69 SHA-1: 2209b87191ff69e99bf505a740a07371efc3c7ec SHA-256: 933303a21b375fba51404d20e8a78e3fb6abaab2217166e688815ed2649335d4
126 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including ML and ClamAV, as malicious and likely phishing-related. It contains numerous external links, many pointing to disposable hosting, suggesting a link farm or redirection mechanism. The document body, though heavily obfuscated, appears to contain text related to product manuals, which is a common lure for phishing attacks.

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://midufefew.ru/strik?utm_term=mr+coffee+10+cup+thermal+manual PDF link annotation
    • https://cdn.sqhk.co/wanoziku/EgccjgL/upcoming_fight_this_weekend.pdfIn PDF document text
    • http://xivokosu.iblogger.org/vegegenokikevevopawivawot.pdfIn PDF document text
    • http://vezokikawelin.iblogger.org/49475735591.pdfIn PDF document text
    • http://tedusoxunola.22web.org/kenmore_elite_electric_oven_manual.pdfIn PDF document text
    • http://jitokinut.iblogger.org/sap_hana_for_all_entries_performance.pdfIn PDF document text
    • https://cdn.sqhk.co/rapowipijes/hjcgfdr/farkle_rules_free.pdfIn PDF document text
    • https://warevinigipa.weebly.com/uploads/1/3/4/8/134898994/donivoxugubopi.pdfIn PDF document text
    • https://cdn.sqhk.co/bijilixiger/ljgCjaj/android_10_file_manager_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/terasovo/GNgeUge/rock_hero_receivers.pdfIn PDF document text
    • https://kufibewiti.weebly.com/uploads/1/3/1/4/131406300/2568678.pdfIn PDF document text
    • https://cdn.sqhk.co/fezemepusap/jhjVgiq/rimozidaf.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://wuzuvulas.epizy.com/1191202945.pdfIn PDF document text
    • http://tugoxejemikoze.epizy.com/10834059238.pdfIn PDF document text
    • https://7fd672c9-0ac8-42d3-9d3c-9ebb2fbea2b4.filesusr.com/ugd/92785a_70cd0d7fd9444d4597974bba9198d943.pdf?index=trueIn PDF document text
    • http://wibenuke.epizy.com/deep_learning_python_o_reilly.pdfIn PDF document text
    • https://042e50b4-45d0-4577-915a-c14d43ab21ad.filesusr.com/ugd/18f527_a29c71720f964b79a25a0073a2638e80.pdf?index=trueIn PDF document text
    • http://gedokimisizat.rf.gd/96179986185.pdfIn PDF document text
    • https://070488ba-e3d9-4c74-834b-445551f5513c.filesusr.com/ugd/fb83f1_513fe98d9bf64244bc4d208e4ed652a6.pdf?index=trueIn PDF document text
    • https://7133fc40-0b9c-4701-b953-e7fafc934b44.filesusr.com/ugd/70a38d_44fa9b697f0c4c448f5822dc5dd58049.pdf?index=trueIn PDF document text
    • http://lakuxizutigevo.rf.gd/how_to_open_paint_in_windows_10.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_off0000d081.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD081 5276 bytes
SHA-256: b2867ae4779102d788ae5cc3d4784dc81e2a8dfbc49992b3ba0e9dc486b768ec
font_01_sfnt_off0000e25b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE25B 11000 bytes
SHA-256: aee883b59f9c3c7cf392907acbcdac75983af2bc8db46cc529202ce2a8c61e65

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