Malicious PDF — malware analysis report

Static analysis result for SHA-256 f9f7d62bc1ce5c10…

MALICIOUS

PDF

94.5 KB Created: 2021-03-16 07:45:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 53d9be0de6ad526c718fbac4c6ca8488 SHA-1: 1216d760e240b511c425aa7e4e7669a86d4a875b SHA-256: f9f7d62bc1ce5c1087c7ba0af41d4b9e453bc6f781cb96074a44f967d586b709
126 Risk Score

Malware Insights

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

The PDF was flagged by ML and ClamAV as malicious, with heuristics indicating it functions as a link farm on disposable hosting. The embedded URLs, such as https://botokaw.ru/123?utm_term=adobe+acrobat+3d+mac, are likely used to redirect users to phishing sites or download further malicious content. No scripts were extracted, but the PDF structure and URL patterns are consistent with phishing lures.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://botokaw.ru/123?utm_term=adobe+acrobat+3d+mac PDF link annotation
    • http://gepokupaburorew.mywebcommunity.org/economic_development_corporation_of_new_haven.pdfIn PDF document text
    • http://xenipufuk.22web.org/69509312372.pdfIn PDF document text
    • http://driveformclanemilwaukee.com/99822322301ap317.pdfIn PDF document text
    • http://kanshoper.site/brussels_midi_tourist_informationfr5q4.pdfIn PDF document text
    • http://jigikujed.scienceontheweb.net/mcsa_certification_study_material.pdfIn PDF document text
    • http://kurametugugu.mygamesonline.org/73041952.pdfIn PDF document text
    • http://pijonon.22web.org/the_art_of_game_design_2nd.pdfIn PDF document text
    • http://navalny.design/97861609617by8hu.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://uploads.strikinglycdn.com/files/898eb423-0e87-4f0d-923e-a43521b74cfd/fujumaj.pdfIn PDF document text
    • http://tasewegevatale.rf.gd/definicion_de_materialismo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7c81f862-83ca-4d59-a581-c2c4c2eae96b/autosomal_pedigrees_worksheet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ab147c9a-5867-4ab6-b0eb-0763e3174603/linksys_ac1200_max_wi-fi_range_extender_re6500.pdfIn PDF document text
    • http://jopiliseduvorop.rf.gd/1996_ford_ranger_lug_pattern.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dffc6526-d5c3-46a8-b58f-9b2fe2a6d54b/wakamowigaxinepa.pdfIn PDF document text
    • http://bunokupisosep.epizy.com/74274780254.pdfIn PDF document text
    • http://wemosoxa.rf.gd/sharp_aquos_s2_global_rom.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/11663d75-4ff1-4613-8bb2-760e23ebb19f/bezonemisufamawivewigujal.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cbe4f9b7-26ef-4b7e-9e60-a80bbef2df79/nopedopowanetiwedo.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f069.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF069 5336 bytes
SHA-256: 164c80a08652e5ca08dd035ced9931e43c47319db4bc8cd8b9fe8f79f5753032
font_01_sfnt_off00010327.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10327 4800 bytes
SHA-256: 813f610e7149ed33f3c3e5e42b617dce9de624d3bbaf48b652cc5efa9865bb5f
font_02_sfnt_off00011371.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11371 16264 bytes
SHA-256: 032f16c06394f8e6f3394051cb0831d2b32092a0520ab7c2c9b44f79631845eb
font_03_sfnt_off0001454f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1454F 16488 bytes
SHA-256: d97693af3883ef4b8ab9c4f94a2f62802c6df3627ecc5ab5b0ef46b22874265a
font_04_sfnt_off00015bdd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15BDD 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c