Malicious PDF — malware analysis report

Static analysis result for SHA-256 d3aabd7bf204aa4d…

MALICIOUS

PDF

84.5 KB Created: 2021-03-14 01:25:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-17
MD5: 22ba636ced48a45a30d6c5c1f7b20706 SHA-1: 9d4b6cb4e6bdbbbe4a2c390e42cb3f0a751e5f21 SHA-256: d3aabd7bf204aa4df18f7afdcb5c5c4b9fdea03fd613788b515249422fd2d8b6
126 Risk Score

Malware Insights

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

The sample is a PDF file flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier as malicious. It contains numerous external URIs, many pointing to disposable domains, suggesting a link farm or phishing infrastructure. The PDF's structure and embedded content indicate it's designed to redirect users to potentially malicious websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://druttle.ru/wix?keyword=costume+change+emotes+city+of+heroes PDF link annotation
    • http://trychambre.xyz/scrabble_rules_replacing_tilesd7lc5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4484997/normal_6028aa2dd59a1.pdfIn PDF document text
    • http://wodedutipif.medianewsonline.com/videbonuvunesim.pdfIn PDF document text
    • http://livecopyrightverification.com/car_wash_incident_report_formyv1fd.pdfIn PDF document text
    • http://linoveda.22web.org/56561380808.pdfIn PDF document text
    • http://hocostyle.ru/lejaluxans856b.pdfIn PDF document text
    • http://mizizufiku.mywebcommunity.org/the_water_is_wide_james_taylor_tab.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4403259/normal_5ff8ff8835954.pdfIn PDF document text
    • http://pogawubujogeje.mypressonline.com/maximum_shear_stress_theory_is_used_for_which_shaft.pdfIn PDF document text
    • http://tesupelaj.sportsontheweb.net/94672890876.pdfIn PDF document text
    • http://debesur.iblogger.org/apomixis_en_citricos.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://6e345194-e688-4037-aa24-2ff230a16836.filesusr.com/ugd/ce9fe1_109ebb170c7a43f3af7d807450932d3f.pdf?index=trueIn PDF document text
    • http://gogujigasad.onlinewebshop.net/what_do_black_ants_mean_in_a_dream.pdfIn PDF document text
    • https://c827806f-f9bf-4fd3-a4ce-e487c020fa79.filesusr.com/ugd/6fd45c_1f2594ff7e3b4e34ab0cd15f9d692ef1.pdf?index=trueIn PDF document text
    • http://mekofirudusem.rf.gd/65550701300.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/741f925f-6412-4bec-8cef-b6d83ad802cd/how_to_reprogram_garage_door_keypad_craftsman.pdfIn PDF document text
    • https://2c9641c8-5874-4869-9b94-f1378e60aa6b.filesusr.com/ugd/efc1f6_6e6f5fa89d6341f9a5f9125a8e2a1fc9.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/edb70bda-9231-4f10-96fa-5e188c704990/23692961912.pdfIn PDF document text
    • http://poruroj.epizy.com/winijatanok.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c7eef13c-f5e4-4d6c-bc28-2afc72bc506d/commercial_real_estate_letter_of_intent_to_lease_template.pdfIn PDF document text
    • http://dodinakek.rf.gd/folipasuxulituxigogupin.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_off00010ce8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10CE8 5272 bytes
SHA-256: 99c7b61fbdfba9f4af7386af560344b1b6be056264cdb88e7198c6e7c3b2e87b
font_01_sfnt_off00011eb5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11EB5 11196 bytes
SHA-256: 4932c0b0f6c8ad074d65d2f19f53a44e70cf13a729882ec09cdb1e55fadbdc04

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