Malicious PDF — malware analysis report

Static analysis result for SHA-256 d3bedd9e2e5be181…

MALICIOUS

PDF

75.4 KB Created: 2021-05-12 03:04:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-24
MD5: cd0945c28ac9c969cd5d45d98c58f8a5 SHA-1: 77864c425ab465e3e0cb9f4950f990f748b7b4d6 SHA-256: d3bedd9e2e5be181df76ce99a0e83ee82775baa7e9c93c5ff36eec79b9e97578
126 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs and is flagged by ML classifiers and ClamAV as malicious, specifically as a phishing or trojan. The document body, though heavily obfuscated, appears to be a lure related to furnace warranties, directing users to external sites. The presence of multiple disposable hosting links and redirectors suggests a phishing campaign aimed at credential harvesting or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://dugedepap.ru/strik?utm_term=how+long+do+furnace+warranties+last PDF link annotation
    • https://cdn.sqhk.co/bizujutenifo/ihbNU15/200556027.pdfIn PDF document text
    • https://cdn.sqhk.co/tumupowe/Ugdhfjb/69360067027.pdfIn PDF document text
    • http://my-favshop.online/dubai_opera_guided_tourfcjq6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4485321/normal_5ff8cb173eb6b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450870/normal_6041bcd86a5cd.pdfIn PDF document text
    • https://cdn.sqhk.co/duzupafuj/l2jdrUp/gozujuwitadivoxusata.pdfIn PDF document text
    • http://fortysgjdk.fun/59116231650xy3lt.pdfIn PDF document text
    • https://jabapimodixo.weebly.com/uploads/1/3/5/3/135314731/3d21b2a759c.pdfIn PDF document text
    • http://generatorsale.ru/bikofugiguzudawuvotesafozmjbj3.pdfIn PDF document text
    • https://cdn.sqhk.co/mopomotop/UU1wkjj/lupowebipe.pdfIn PDF document text
    • http://itasda.online/about_yourself_in_interview_question_answer44vvo.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4459034/normal_5ff6686f35239.pdfIn PDF document text
    • http://robolab.one/orbit_12_station_irrigation_controller_manualh7kwc.pdfIn PDF document text
    • http://helplnstagram-confirm.com/58716107961k61y4.pdfIn PDF document text
    • http://shoop-fl.ru/85826567902a35z3.pdfIn PDF document text
    • https://pigiburoletu.weebly.com/uploads/1/3/2/6/132695467/valeferomixi.pdfIn PDF document text
    • https://pugiputofal.weebly.com/uploads/1/3/4/7/134740318/6040576.pdfIn PDF document text
    • https://cdn.sqhk.co/jebanufebejo/RMehbif/18052970146.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/b61e200d-7716-4b2a-9ba0-5cae689ba9da/is_selling_life_insurance_a_good_career.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/81a2ccdb-ef90-4377-aa6b-ad4bd1daa3c9/sony_a350_lenses.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dbf64173-2be2-4b55-ac33-1f2b1c7883ce/seranofuwomupufowezinis.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/22cf055a-8763-4458-b0aa-fef16588a4b7/49700439975.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7b3d2680-6bea-40a4-bfd5-78add34e2c89/is_health_labs_reliable.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_off0000e81c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE81C 5240 bytes
SHA-256: e3d206686cb5a5a0cb6e28ce622c29bdc3bb50fb747b00b9d944081ad5cd4e10
font_01_sfnt_off0000fa16.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA16 11172 bytes
SHA-256: 634a7a8bafcd31199a7415ce5595a0cf54c06b00d36c6aa8ea293cfaa0adf50d

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