Malicious PDF — malware analysis report

Static analysis result for SHA-256 0981eb8873a8dccb…

MALICIOUS

PDF

72.3 KB Created: 2021-04-06 10:59:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 50bc3d677172acaa386dab5ac6bb25b1 SHA-1: 5f250288da292c53a16b45ccfb7e34ee413c8f01 SHA-256: 0981eb8873a8dccbb54220eb537a1364894a360bf4d177b49e56a2b118ff744c
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://leonvi.ru/wix?keyword=guide+gear+1911+holster PDF link annotation
    • http://puvepagawimideg.iblogger.org/bojuwikenaremubel.pdfIn PDF document text
    • http://lnstagramverificationbadge.com/ruhul_furkan_tefsiri_okue80vi.pdfIn PDF document text
    • http://nuveclovet.xyz/naxivifonaxifapuzenifisfm1.pdfIn PDF document text
    • https://cdn.sqhk.co/dumotometapo/jj4zjfB/piketezuxe.pdfIn PDF document text
    • https://cdn.sqhk.co/wumerelup/nO9jdif/download_tank_battle_royale_mod_apk.pdfIn PDF document text
    • http://matrixbicycles.com/imela_jumbo_mp3_downloadzymat.pdfIn PDF document text
    • http://presente-top.store/648417553331f888.pdfIn PDF document text
    • https://cdn.sqhk.co/futidiwe/7iigjhj/sad_piano_melody_midi.pdfIn PDF document text
    • http://wuwibapuwete.22web.org/what_is_the_story_behind_moonlight_sonata.pdfIn PDF document text
    • https://cdn.sqhk.co/lebapivi/yaNigDI/button_scissors_game_free_download.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://jijulek.rf.gd/51005769546.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/99a6f0df-9296-47ae-896b-016036ef9ca6/old_navy_dress_code_shoes.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bc4864b3-3f7d-4aa7-a4b3-e33b9b0cf6e0/chicago_electric_reciprocating_saw_4.5_amp.pdfIn PDF document text
    • https://761e60ea-5e0e-4c43-b4c2-f6a9045c608d.filesusr.com/ugd/545033_5f821e90e4944605bc706badbf6a7f07.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/46d76313-30a3-480a-8bc8-0adc4c3d9119/replacement_parts_for_porter_cable_nail_gun.pdfIn PDF document text
    • http://jowemalawebabe.rf.gd/mogilarilik.pdfIn PDF document text
    • https://8dac4d01-2cd1-45d2-8b5f-6005f802adc9.filesusr.com/ugd/1f96ce_0e88719f697a4adaad6886bee17a27a1.pdf?index=trueIn PDF document text
    • http://mofububozej.rf.gd/penifizixazagi.pdfIn PDF document text
    • http://pasukebufi.rf.gd/dimafafuzu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/95c788ac-acf8-4882-aa18-ac4ee27adb7d/husqvarna_725ex_awd_air_filter.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6404db30-4ed6-42eb-a6e3-f1fcdf6f027f/22431651547.pdfIn PDF document text
    • http://nonosolagosev.epizy.com/chandi_ki_payal_video.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_off0000dae9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDAE9 5324 bytes
SHA-256: 81aabecc8ad4e983bdc8453c9c2fdac4f29dd32e38cc1e495c19179a21c5f5ed
font_01_sfnt_off0000ed06.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED06 10952 bytes
SHA-256: 02bca2ea2dd9fdee8317cc80027c430d8b60b2ca924ca7bf644b77b57aaa5983

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