Malicious PDF — malware analysis report

Static analysis result for SHA-256 9a279414c7b09038…

MALICIOUS

PDF

81.3 KB Created: 2021-05-10 23:11:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 85baadf6f2c4e1d31eb21027e3384bf3 SHA-1: e9bb8bc317ad35ad06fbd828d8bde98b86b5bf60 SHA-256: 9a279414c7b09038fb7f741162f4782f2dc47eed93dfe025905f14bb84a75c74
126 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs, with one prominent URL pointing to a domain associated with phishing and link farming. The ML classifier and ClamAV detection strongly indicate malicious intent. The document body, though heavily obfuscated, appears to be a lure related to valuable items, suggesting a phishing or malware distribution scheme.

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://gimoguvi.ru/strik?utm_term=how+much+is+a+first+edition+harry+potter+and+the+order+of+the+phoenix+worth PDF link annotation
    • http://nikupajosokob.22web.org/acidit_titrable.pdfIn PDF document text
    • https://cdn.sqhk.co/sexubozadifa/hjidUjg/97629346560.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4484623/normal_605127437723d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4427544/normal_5ffcd1e9caafc.pdfIn PDF document text
    • https://cdn.sqhk.co/bimepefav/xhcgiif/rarokamorogu.pdfIn PDF document text
    • https://cdn.sqhk.co/sepovili/dfhd2jj/cheats_sims_4_xbox_one_vampire.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485943/normal_602fc6559b129.pdfIn PDF document text
    • https://cdn.sqhk.co/lilodipu/dJxjhhb/necromancer_dnd_spells.pdfIn PDF document text
    • http://mebowakop.22web.org/jixolatajopu.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/ed4e9f3f-9c2f-4255-a322-4b000ddb1a08/why_is_my_brother_printer_not_printing_colors_properly.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ec4e0791-ff4e-4524-bd7b-012b549716a6/difference_between_nmap_and_nessus.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8f888b9d-8ed5-4f79-a7bb-cb429b504da0/how_to_remember_geometry_formulas.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/57bface5-9c8a-489c-a16c-e7ca686c7bdf/sujujalamijitupatixunemar.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/93283ace-ada7-4758-b980-3cd1e3a83d50/49775811683.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/72ba41ee-69a8-4a2a-ab88-f65a81c2afaf/sexiest_man_alive_2020_winner_download.pdfIn PDF document text
    • http://bobumevemi.epizy.com/b._com_sem_5_books_gujarat_university.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b7d7d528-5edc-4d89-99e5-9bfe9d38a216/jigiwixoka.pdfIn PDF document text
    • http://durunorutap.epizy.com/muwojipoga.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/36a3e392-175b-4eaf-9e16-87e6acb6fc92/the_travelers_gift_seven_decisions_that_determine_personal_success.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/eb87d085-d9a7-439a-9ba7-c78cbd7d1d05/tupefebixowiverovoba.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/21c71213-43da-4a8b-992c-9cad5a111473/pisogujeteleridun.pdfIn PDF document text
    • http://sopokodage.epizy.com/hashimoto_disease_diet_plan.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_off0000fefc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEFC 5588 bytes
SHA-256: af8ac0c14579c8b71500c357931c35a4a8e27febf9fee2fe4a1928c2220e4d16
font_01_sfnt_off000111f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x111F0 10856 bytes
SHA-256: 9d7d93f26e2413b461e6fa528c0fbc14495ae9fdb37e4fcd38a96d49b3565d5e

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