Malicious PDF — malware analysis report

Static analysis result for SHA-256 62931d45111ccf21…

MALICIOUS

PDF

88.0 KB Created: 2021-03-21 22:43:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 5ed6467b5367da14ed00fe0f917010d0 SHA-1: b966e874c6adaaf463a5894478a85f472225d6ca SHA-256: 62931d45111ccf21fd1dd28ab08eae29884f48ba3f86a7c6ac5d38fba4ea62c1
126 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs, many of which point to disposable domains and are associated with link farms, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or trojan distribution, disguised as a software download lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://resalured.ru/123?utm_term=adobe+photoshop+cc+2015+free++filehippo PDF link annotation
    • http://wijofotezopadik.medianewsonline.com/51578025727.pdfIn PDF document text
    • http://wemuwetafivaxe.sportsontheweb.net/12724356538.pdfIn PDF document text
    • https://cdn.sqhk.co/wibononuve/Uibj0gc/32478365111.pdfIn PDF document text
    • https://cdn.sqhk.co/bowawugafux/egehhjg/sniper_elite_nazi_zombie_army_trilogy_system_requirements.pdfIn PDF document text
    • http://xuzugukow.iblogger.org/how_to_control_variable_speed_pump.pdfIn PDF document text
    • https://cdn.sqhk.co/burexewejam/eiagujf/bounce_gym_shoes.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://1c92f6d8-19eb-429c-9239-1cf6be91372f.filesusr.com/ugd/cc1a03_a26cdc3f3687458082d9f96e10fcae62.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/xutomoxu/anime_dubbed_apk.pdfIn PDF document text
    • http://sukeboragepude.epizy.com/29068386397.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d5c225dd-18f3-4669-b445-21503feb4e41/ross_stores_opening_back_up.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/954ec1ab-5728-4af8-9049-d79ef436d649/32048984103.pdfIn PDF document text
    • https://s3.amazonaws.com/dugibabafod/vuxorate.pdfIn PDF document text
    • https://s3.amazonaws.com/tevomenil/kemejisuxegoma.pdfIn PDF document text
    • https://s3.amazonaws.com/lakadutof/purble_place_cake_shop_game.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8abdfc85-5ea4-40be-9792-3501d0ec9b12/nozozizuwegodimixurawad.pdfIn PDF document text
    • https://8a3b53b1-4b9a-43fa-8d11-acca05b1aa90.filesusr.com/ugd/7ad284_c880afd484984a41ba6400c9d6064f90.pdf?index=trueIn PDF document text
    • http://mojenuj.atwebpages.com/xixeditojedizigip.pdfIn PDF document text
    • https://0df6220b-9630-4647-aab6-0d9db69b9d59.filesusr.com/ugd/8b97dd_988979aa24ba4bc9befba2fb8e4bd517.pdf?index=trueIn PDF document text
    • http://ledufowi.myartsonline.com/ib_physics_waves_questions_and_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0a3d5b76-0a65-46bd-a845-d5f44a84e4d9/how_to_clean_filter_on_samsung_front_loader_washing_machine.pdfIn PDF document text
    • https://538d8494-0c7d-401a-b890-0485f6bc7bca.filesusr.com/ugd/29c71c_f34c0237c7d740189cbc55c55995c136.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_off000119fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x119FD 5612 bytes
SHA-256: 0d10b57968ad8b63d2b1670086eda7d291b0710367ed58be984189c4846d64dc
font_01_sfnt_off00012d1d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12D1D 10892 bytes
SHA-256: 697f8b6011a41a40ac33c57ce4468db1ad4533c6c621be8a7b0b4a107f058403

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