Malicious PDF — malware analysis report

Static analysis result for SHA-256 b6362091eb11496a…

MALICIOUS

PDF

83.3 KB Created: 2021-03-20 00:53:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a371fad96e872db5c6227e196f81f690 SHA-1: 1762c623cbab03a8d26925031864a5770fa70b44 SHA-256: b6362091eb11496ac0f6824f50b722168d53473c51c2209c051ba35cc0861cd2
126 Risk Score

Malware Insights

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

This PDF document was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. It contains numerous embedded URLs, with one prominent link pointing to 'https://vilenefex.ru/strik?utm_term=how+to+stop+vizio+sound+bar+from+turning+off', suggesting a phishing or redirection attempt. The document's structure and content indicate it is likely a lure to drive users to malicious sites.

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://vilenefex.ru/strik?utm_term=how+to+stop+vizio+sound+bar+from+turning+off
    • https://cdn.sqhk.co/lakodatoli/aA0hbq9/funny_love_animation_quotes.pdf
    • http://nilofebep.iblogger.org/heart_failure_guidelines_2019_esc.pdf
    • https://cdn.sqhk.co/wirowanorax/5l1icY0/vr_space_simulator.pdf
    • http://nazorizuz.medianewsonline.com/35788150642.pdf
    • http://bathforlegs.xyz/kosowiwenejutamwogm2.pdf
    • https://cdn.sqhk.co/tajixixejafi/hfljbRZ/van_leeuwen_oat_milk_ice_cream_review.pdf
    • http://lugabev.mygamesonline.org/the_rules_of_the_game_movie_reviews.pdf
    • http://pubguckazan.com/gapisiwuwuehusb.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://2e03c77f-99cc-4591-9807-54d8d49c9ce6.filesusr.com/ugd/759733_05f740aa196242aea27f794aa8b4f4cf.pdf?index=true
    • https://8fc1c2d6-49ba-4d63-8b95-0327ef2b1627.filesusr.com/ugd/1849a1_b3007b81e05e4f228a8df667125bf399.pdf?index=true
    • http://suboxasolu.rf.gd/nist_randomness_test.pdf
    • http://raseloxezonavo.epizy.com/harwich_haven_authority_annual_report.pdf
    • https://s3.amazonaws.com/widiku/famous_childrens_short_stories.pdf
    • http://rabatelekovufar.myartsonline.com/perfume_the_story_of_a_murderer_movie_english_subtitles.pdf
    • http://xobeminal.atwebpages.com/honda_inverter_eu2200i_recall.pdf
    • http://jatujij.rf.gd/55942362124.pdf
    • https://s3.amazonaws.com/panalipolifod/agronomy_mdpi_template.pdf
    • https://s3.amazonaws.com/gowupuzokowuxes/healthy_eating_guidelines.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001084f.bin
da89c050b7df8408572ae00a4bd8e39f48fcc300903eb88895bfb76f85cb4326		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1084F 5632 bytes
font_01_sfnt_off00011b7e.bin
1ff22eb6421b8b803906e57dfa039a82984df2adab93811d55215bdc33f2fc1a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11B7E 10664 bytes

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