Malicious PDF — malware analysis report

Static analysis result for SHA-256 e452162e5505a168…

MALICIOUS

PDF

96.4 KB Created: 2021-03-25 15:49:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 42feabf4776c3ee28edb57f2fa0e7349 SHA-1: b24d3214180dc4c9507ce00da2ea8e252f8b6182 SHA-256: e452162e5505a168d8303d2b8784bc1efd6952fb192ac1889f75eeb09e79c207
194 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The presence of a large number of external links, many pointing to disposable domains, suggests a link farm or phishing campaign designed to redirect users to potentially harmful websites. The document body, though heavily obfuscated, contains metadata related to its generation, but no direct user-facing lure text was clearly extracted.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9961

Heuristics 7

  • 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 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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/123?utm_term=idsa+guidelines+hap+vap PDF link annotation
    • https://cdn.sqhk.co/sebixodof/5ifQtpu/polygyny_is_group_of_answer_choices.pdfIn PDF document text
    • https://zitejapaj.weebly.com/uploads/1/3/1/8/131872087/7962513.pdfIn PDF document text
    • https://cdn.sqhk.co/tixuniwe/KZgfiil/golf_blitz_play_online.pdfIn PDF document text
    • http://fevozogu.iblogger.org/corpus_alienum_adalah.pdfIn PDF document text
    • https://kubuvapag.weebly.com/uploads/1/3/0/7/130776206/xuxiwoxokagifukipus.pdfIn PDF document text
    • http://nufapivevavenak.22web.org/assassin_s_creed_odyssey_pc_settings_guide.pdfIn PDF document text
    • https://cdn.sqhk.co/pawijilabu/yGigD6r/motu_patlu_cartoon_video_download_mp4_pagalworld_2020.pdfIn PDF document text
    • https://cdn.sqhk.co/rozesivotix/jtjjahc/reincarca_cartela_vodafone_cu_cardul.pdfIn PDF document text
    • https://bamigabimav.weebly.com/uploads/1/3/1/6/131636977/9828305.pdfIn PDF document text
    • https://mibonujatupogu.weebly.com/uploads/1/3/5/2/135297119/logobuvaxuwed-rujekezo-milexuwamuwigo-vivadenobipew.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://393102e6-89af-4738-8cad-89662dba8dc5.filesusr.com/ugd/33a16d_852c2dc48c214518952c029c16041edb.pdf?index=trueIn PDF document text
    • https://2703069b-a6ff-4ff9-983c-db139a8d76ba.filesusr.com/ugd/8b61cf_b512aef0c9704d3cac8bac4a68a4433c.pdf?index=trueIn PDF document text
    • http://bilovero.rf.gd/definition_of_academic_performance_by_different_authors.pdfIn PDF document text
    • https://s3.amazonaws.com/dofufiri/nemibuxojadunap.pdfIn PDF document text
    • https://s3.amazonaws.com/tokit/57965878593.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/806d6a78-87e9-464b-8a94-7423134da48a/why_is_my_brother_such_a_snitch.pdfIn PDF document text
    • http://wazuvolixevafo.rf.gd/zivamalifewalav.pdfIn PDF document text
    • https://00c0516a-c822-4344-a779-6f74e039753d.filesusr.com/ugd/9e41f0_a583b71be48d444498c10c716c82ca8a.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/62c5263c-c8ff-4d64-a60e-ceba6c3bae09/ruvoneligevelonopi.pdfIn PDF document text
    • https://s3.amazonaws.com/jevelel/nopot.pdfIn PDF document text
    • https://6d8b2927-5c4d-40df-b593-c6bd35e19528.filesusr.com/ugd/1adac8_9945665ce0d64548922a4494f87f9e39.pdf?index=trueIn PDF document text
    • http://zedotedifajo.epizy.com/vamepamuvodasexepibuzosu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7f48360e-865f-4ee1-94e6-726371510438/bawemoxofoxetopowivibuzi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/560a6c4e-36c1-4495-8361-a6e2dc5161cf/doctor_of_philosophy_in_educational_administration.pdfIn PDF document text
    • https://s3.amazonaws.com/kujapomib/one_piece_episode_guide_filler.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cd0814fc-0383-4c68-b07c-aae7296ea89a/how_do_you_find_the_horizontal_component_of_a_vector.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_off00013bd2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13BD2 5124 bytes
SHA-256: efdbf223d572e1c01b02f4f86e8367cfae6a21c264bfb50a50bdaeacd566e3dd
font_01_sfnt_off00014d46.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14D46 11276 bytes
SHA-256: f4d63f6e2f82329e24142a4762a4ea4fbf1ccca8b48e5024c632365e2c61a5e0