Malicious PDF — malware analysis report

Static analysis result for SHA-256 ed9837f2914a1abe…

MALICIOUS

PDF

81.0 KB Created: 2021-03-05 11:52:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: ab3825a178269bba562fe96341f94275 SHA-1: dc1ca7e2d8dcb004a81d757792052a35046456c8 SHA-256: ed9837f2914a1abe25fb7a3c813e7bae915ee038fe91fb97f242f69ae5df4a04
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs pointing to disposable domains, indicative of a link farm designed to redirect users to malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent. The presence of external URIs and link farm heuristics indicates the document's primary purpose is to facilitate access to potentially harmful external resources.

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://mezovuduw.ru/strik?utm_term=best+hobbies+for+intellectuals PDF link annotation
    • http://lopekojupapo.22web.org/activated_windows_8._1_pro_64_bit.pdfIn PDF document text
    • http://dosijefa.mypressonline.com/bopubemigalozepubub.pdfIn PDF document text
    • http://politach.com/does_apple_cider_vinegar_help_you_lose_weight_fast30qbq.pdfIn PDF document text
    • https://cdn.sqhk.co/nikazurokuv/idhbbjj/46137756392.pdfIn PDF document text
    • http://choosemadam.site/what_is_the_book_of_laws_for_islamqdqff.pdfIn PDF document text
    • http://siwupojotuj.getenjoyment.net/17720606546.pdfIn PDF document text
    • https://cdn.sqhk.co/nebafori/jj3Wuhe/forester_xt_off_road_build.pdfIn PDF document text
    • http://sezejawi.mypressonline.com/14658580648.pdfIn PDF document text
    • https://cdn.sqhk.co/nadetajagupe/gj7giic/rtc_bus_schedule_12.pdfIn PDF document text
    • http://mavpa.fun/autosomal_dominant_polycystic_kidney_disease_patient_information3cmga.pdfIn PDF document text
    • http://bamefidev.mygamesonline.org/2011_chevy_traverse_headlight_bulb_part_number.pdfIn PDF document text
    • https://cdn.sqhk.co/fetebutujo/hbhfTji/download_game_throne_rush_for_pc_offline.pdfIn PDF document text
    • http://gejokakop.mygamesonline.org/15923403866.pdfIn PDF document text
    • http://rastet-malysh.ru/962269939713udjd.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://e209d09f-5af8-48a0-acfc-72d03e9bea0d.filesusr.com/ugd/946fcc_e21f1ec98c7d4b6198667262f7b2a6dc.pdf?index=trueIn PDF document text
    • http://fetenebepoxoso.epizy.com/logijitolafaxojiwazod.pdfIn PDF document text
    • https://850a36a1-966c-46c3-86ed-e15bcb5778a7.filesusr.com/ugd/ede58b_0910cf46c35240e2906b58af5926ad02.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e46e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE46E 3600 bytes
SHA-256: 6310867eb55971b5d8ea5013ac129bca5e5f8adb5584eb37505ce005c679e493
font_01_sfnt_off0000f14e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF14E 5040 bytes
SHA-256: 436f616b17d96ef8c13c59df70d1cfbe478e718685ac2693f2ac0f3626f78a08
font_02_sfnt_off0001026a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1026A 10612 bytes
SHA-256: 4ac4751ae8662b1c182489a8333f5fb97264115424ced7c290bd90577fbec1ca
font_03_sfnt_off000126d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x126D6 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

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