Malicious PDF — malware analysis report

Static analysis result for SHA-256 582dd7cc7a9e51b5…

MALICIOUS

PDF

74.7 KB Created: 2021-03-29 01:30:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 7c5610ff94e260a2b852d843c1480f42 SHA-1: 3508f05bd4c3068fe4e028f9af6429191f133c4b SHA-256: 582dd7cc7a9e51b5f756b5c988c4d6b7438f150bc43cd7c22e9ec87cd0d9c95c
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, with a significant heuristic indicating it functions as a link farm on disposable hosting. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution. Although no scripts were extracted, the PDF structure and URL patterns are indicative of a malicious document designed to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://seumenha.ru/123?utm_term=jayhawk+bowling+drill+sheet PDF link annotation
    • http://vezokikawelin.iblogger.org/are_oven_elements_universal.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450876/normal_602a28df00f30.pdfIn PDF document text
    • http://gomijojupi.iblogger.org/dow_blood_test_report_online.pdfIn PDF document text
    • https://cdn.sqhk.co/jeforije/hS7Xjhy/stickman_football_the_bowl.pdfIn PDF document text
    • http://walletelectrum.buzz/cuanto_es_5_milimetros_en_pulgadasdzigz.pdfIn PDF document text
    • https://cdn.sqhk.co/gixotagokezu/iihhgri/empire_rush_rome_wars_tower_defense_mod.pdfIn PDF document text
    • http://robolab.one/holt_physics_textbook_solutionsyw8no.pdfIn PDF document text
    • http://findssldz.xyz/679031097324l1ye.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4455658/normal_6025edbb7eb75.pdfIn PDF document text
    • http://voirlo.xyz/city_mini_gt_accessories_ukon1q2.pdfIn PDF document text
    • https://cdn.sqhk.co/zirigajer/n7a6gdP/mini_golf_paradise_island.pdfIn PDF document text
    • https://cdn.sqhk.co/kanereneb/YidShjj/best_rv_camping_near_park_city_utah.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385648/normal_605efcb3a3fe7.pdfIn PDF document text
    • http://gexedufez.22web.org/wasteland_2_guide_rail_nomads_camp.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://39c1d623-eccb-4af0-a86a-15328a2d61f9.filesusr.com/ugd/3cb6cb_6e9b5cf9e8ed4d26afedbca5dc126bf0.pdf?index=trueIn PDF document text
    • http://poxizaxo.epizy.com/iphone_6_plus_user_guide_for_seniors.pdfIn PDF document text
    • http://nepupiborama.rf.gd/timorumowotoseludi.pdfIn PDF document text
    • http://dinedolorexos.rf.gd/literature_reader_class_6_ratna_sagar_answers.pdfIn PDF document text
    • http://gedemawudad.epizy.com/types_of_access_control_systems.pdfIn PDF document text
    • https://ddd59a73-be73-4575-bd7b-2e5900175f8b.filesusr.com/ugd/5dc0ef_75612394bdb8475f90af0bc38a31940b.pdf?index=trueIn PDF document text
    • https://8e0cabef-d481-4215-b437-8a5fc4e4723c.filesusr.com/ugd/f41140_ce498e84e06f4621a205cf11185888cc.pdf?index=trueIn PDF document text
    • https://4993f9ff-345c-4c03-a8ec-d4f8dac664d6.filesusr.com/ugd/debbe1_6f7a783c49484b5693a779796a22ca9c.pdf?index=trueIn PDF document text
    • https://1237a3da-0b33-4890-9ba9-974507bf2590.filesusr.com/ugd/3e0cb9_91a36b456d42429cbf9881ad9c60a23e.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_off0000e547.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE547 5472 bytes
SHA-256: 7536f2db256f89d4751f91ce542aa6691979d5238d58dd1d0d40d4507b5c64c7
font_01_sfnt_off0000f7f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7F2 10892 bytes
SHA-256: ed2ba810b965efa946fb633d04cfee277c729fda968e987734a7851d170823c5

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