Malicious PDF — malware analysis report

Static analysis result for SHA-256 9be0c5f3f2f7dd57…

MALICIOUS

PDF

74.5 KB Created: 2021-03-02 22:42:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 764456be8f38cb3305fe6920d3a81579 SHA-1: fa897424457d969edbdf01f8e6517c8ed24f7ea9 SHA-256: 9be0c5f3f2f7dd57e7881204358058b606b82aa682529d2bd3887786504271c2
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF was flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier as malicious. It contains numerous embedded URLs, many pointing to disposable domains and link farms, indicating a phishing or malware distribution attempt. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' specifically identifies the document's structure as a link farm on disposable hosting, reinforcing the malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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/aws?utm_term=saffire+pro+40+not+working+with+mojave PDF link annotation
    • http://dududuw.mypressonline.com/compound_shapes_rectangles_worksheet.pdfIn PDF document text
    • https://cdn.sqhk.co/tomubozes/uggijUa/dead_age_wikia.pdfIn PDF document text
    • http://mushygushysayings.com/71346505897evqhs.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4480749/normal_601290308ad16.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387229/normal_6032f75d010de.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4421613/normal_600111432b8c5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417037/normal_6035817a5d201.pdfIn PDF document text
    • https://cdn.sqhk.co/taxeseta/dherfDA/tps_hero_hunter_of_zombie_world_mod_apk.pdfIn PDF document text
    • http://xafesuvorolivig.scienceontheweb.net/30984022419.pdfIn PDF document text
    • http://takipibimaxubov.sportsontheweb.net/breach_of_contract_law_definition.pdfIn PDF document text
    • https://cdn.sqhk.co/bujerinalo/970zagh/56743311928.pdfIn PDF document text
    • https://cdn.sqhk.co/ladetozuxi/igigd0G/segapixefawuwogijaked.pdfIn PDF document text
    • http://numulul.mygamesonline.org/poulan_pro_snowblower_electric_starter.pdfIn PDF document text
    • http://tejajugumoneton.66ghz.com/catia_v5_full_version.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://wefebasutij.epizy.com/67069084702.pdfIn PDF document text
    • http://gafodix.myartsonline.com/why_is_the_bell_jar_called_the_bell_jar.pdfIn PDF document text
    • http://wejufutaz.onlinewebshop.net/how_often_do_shareholders_receive_dividends.pdfIn PDF document text
    • http://zorikeroz.onlinewebshop.net/dell_latitude_d830_maximum_memory_upgrade.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_off0000db69.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB69 5728 bytes
SHA-256: 7b5ad1f23e0a124089d826a4624fd44524352a1a1d8c7eb79ee5d9e81bae10cc
font_01_sfnt_off0000eede.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEDE 1800 bytes
SHA-256: e9a5a1f6ed95b1e3669933bb00002ad32a1708c3e0b735191cad5e02368a6c7d
font_02_sfnt_off0000f76c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF76C 10840 bytes
SHA-256: 7fcac12fd628b66a74f31b42d39da806017e73b12bb076ff05e4215f811d9989

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