Malicious PDF — malware analysis report

Static analysis result for SHA-256 54bb58afa2838017…

MALICIOUS

PDF

72.4 KB Created: 2021-03-25 04:46:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: b9cde04b7dcbe1c532f29219acef2a80 SHA-1: 7ade1d8f7b647aa0307417c6559e6df52b58eb5f SHA-256: 54bb58afa283801756d0299cd0acfe869d323a4d56e3840dea90c08440ebecac
186 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many hosted on disposable domains, suggesting a link farm designed to direct users to malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and numerous external links point towards an attempt to redirect users to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9959

Heuristics 6

  • 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 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.
  • 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://botokaw.ru/award?keyword=2020+nissan+armada+owners+manual+pdf PDF link annotation
    • http://luxuwum.mypressonline.com/pubilididixokakekasaw.pdfIn PDF document text
    • https://cdn.sqhk.co/betewulo/2ya4sjh/thunder_assault_raiden_striker_unlimited_crystals.pdfIn PDF document text
    • https://cdn.sqhk.co/bepotedaxus/UjdP8kN/color_bump_casual_game_levels.pdfIn PDF document text
    • http://kekijojovif.sportsontheweb.net/hemicrania_paroxstica.pdfIn PDF document text
    • https://cdn.sqhk.co/rorajakura/vmgiidE/short_animated_love_story_download.pdfIn PDF document text
    • https://cdn.sqhk.co/zefafulolit/jezlkic/98334122771.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://8d40832c-2e2b-4284-8151-bb35a16d80ac.filesusr.com/ugd/05d014_98a732624b764e2d9d2b5d7add81cf48.pdf?index=trueIn PDF document text
    • https://8b2103c5-345b-48fd-98e3-f19c90c4efd0.filesusr.com/ugd/0e2875_a755d75b2e5e40108d4ad35c26af2340.pdf?index=trueIn PDF document text
    • http://zeroxezubanalil.onlinewebshop.net/96745499978.pdfIn PDF document text
    • http://tepominofujemo.atwebpages.com/gepasibawaxi.pdfIn PDF document text
    • http://gakilasefit.myartsonline.com/cambridge_primary_mathematics_stage_5_teacher_s_resource.pdfIn PDF document text
    • https://34570882-574e-4d25-8c0e-d8b9b6c2967f.filesusr.com/ugd/cb2bed_74f847ada7b14602bbe8fb42393e9883.pdf?index=trueIn PDF document text
    • https://38f9ccf9-db33-4582-994d-0ea518e52d38.filesusr.com/ugd/368de4_afbb482363364b90b0fdfa554b4cae4e.pdf?index=trueIn PDF document text
    • https://9305c775-266c-4126-9ef9-90a5cffee957.filesusr.com/ugd/c3f88d_4921e6ef9ec244d19d0672179bc0df1f.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/5f9649fa-645f-4873-bb35-f686ebd23e55/novena_al_espritu_santo_catlica.pdfIn PDF document text
    • http://rolubumemetujin.atwebpages.com/34712068315.pdfIn PDF document text
    • http://supuwevul.atwebpages.com/100_deadly_skills_the_seal_operatives_guide_to_eluding_pursuers.pdfIn PDF document text
    • https://0c2a99dd-71fd-4a0d-b96f-672cfa785c21.filesusr.com/ugd/515c54_e4fd4d67186b4858bb63c2ab74e9f939.pdf?index=trueIn PDF document text
    • https://f8b2de7a-6012-4721-b8f1-df5267d6bb95.filesusr.com/ugd/8ebb60_24a31d2a07bc45f69a2a62327b93f8d0.pdf?index=trueIn PDF document text
    • http://miganuvag.myartsonline.com/1000_watts_power_amplifier_schematic_diagram.pdfIn PDF document text
    • http://bitenozof.atwebpages.com/what_is_mcdonalds_hourly_pay_uk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d1aa573b-2179-463d-b4b7-302f5bbdac18/dell_e207wfp_specs.pdfIn PDF document text
    • https://cf268418-7549-4780-9cff-e39e61b5276c.filesusr.com/ugd/0b1cf2_3348ebb49d134f9ab93871db5e47b3a9.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/f1d0cdad-82f2-40e9-a670-c498aacf30b0/how_to_draw_what_you_see_book_depository.pdfIn PDF document text
    • https://3a00e800-a8eb-44ae-aafc-ae9aecab8e06.filesusr.com/ugd/1715bf_9684e8b54628431a9b80077ebbc828d4.pdf?index=trueIn PDF document text
    • https://b3d988c2-7a7d-4c3c-9141-221b6550481e.filesusr.com/ugd/9dda13_ffe894430f7d463b8bd5f7c8987607e0.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_off0000dbb7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBB7 5460 bytes
SHA-256: f4628af4c5dbd2a4078e325906a0a04d191c8535546c5091de6b6254b866a05b
font_01_sfnt_off0000ee40.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE40 10712 bytes
SHA-256: 156202424e1b17d3661e16f16fff7ec92af3291884458bbf918b99f6d3aecab0