Malicious PDF — malware analysis report

Static analysis result for SHA-256 210804ed69361252…

MALICIOUS

PDF

84.2 KB Created: 2021-04-07 02:55:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 3edd95fe376396a00f62bb69a17f3f96 SHA-1: 2d40f493cb083135a08a9f503863b17507d5ce1c SHA-256: 210804ed69361252d74c916bca7fcf6a9aa876995ccd36507d66bc0b770c4f06
126 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. The document functions as a link farm, containing numerous embedded URLs pointing to disposable hosting and potentially malicious content. The primary malicious URL identified is https://ponafet.ru/strik?utm_term=old+yeller+book+pdf, which is likely used to redirect users to a phishing or malware distribution site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://ponafet.ru/strik?utm_term=old+yeller+book+pdf PDF link annotation
    • https://xeziguga.weebly.com/uploads/1/3/5/3/135392729/2ff7fef0358.pdfIn PDF document text
    • https://cdn.sqhk.co/bulenupulabo/hgjfgjg/basketball_stars_unblocked_66_full_screen.pdfIn PDF document text
    • https://sadusanolomu.weebly.com/uploads/1/3/4/6/134646393/4589407.pdfIn PDF document text
    • http://lomuwugevona.getenjoyment.net/what_is_the_traffic_light_theory.pdfIn PDF document text
    • https://zezevavibafano.weebly.com/uploads/1/3/5/3/135325489/moninonivikalubopuf.pdfIn PDF document text
    • http://melofuwi.getenjoyment.net/78087111838.pdfIn PDF document text
    • http://forajadafogaxuv.medianewsonline.com/adorno_critical_models.pdfIn PDF document text
    • http://fodefon.getenjoyment.net/zerobupilolojukabopu.pdfIn PDF document text
    • https://cdn.sqhk.co/fevivesuxofo/zZXBhbG/nufipoma.pdfIn PDF document text
    • https://dodesurazuxosa.weebly.com/uploads/1/3/4/3/134382101/lofekutipi.pdfIn PDF document text
    • https://zukikopan.weebly.com/uploads/1/3/0/7/130775822/bowawum_womewexorasupad_diwuwidasinug_lurezivenomi.pdfIn PDF document text
    • https://cdn.sqhk.co/jigitovewuk/ojehjcC/hearts_promise_sheltie_rescue.pdfIn PDF document text
    • https://kezaguwubov.weebly.com/uploads/1/3/4/6/134632481/wevobizuma_nidunawukoba_xosikiwaben_lifoxemugumi.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/janodojivi/52814952242.pdfIn PDF document text
    • https://s3.amazonaws.com/voxipanovigepiv/chasing_the_dragon_2_movie.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/621f6691-3a08-4c12-83ff-25e5b4f74adc/spanish_demonstrative_adjectives_worksheets.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8446a739-3592-47f8-84e0-1e4df257eb2d/82870962163.pdfIn PDF document text
    • http://natukifuza.atwebpages.com/avinash_kaushik_book.pdfIn PDF document text
    • https://s3.amazonaws.com/mamukawaxatali/piberufigelusoj.pdfIn PDF document text
    • https://s3.amazonaws.com/risalenefazozo/boy_scout_pocket_knife_requirements.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/250eff85-90f4-44f3-9bde-2b069ac5f58f/bmw_navigator_7_kaufen.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2caff61f-0652-4cd4-bde7-e03df7577887/zinajis.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f811.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF811 4980 bytes
SHA-256: b1406481f9f62741b04997024047f7d9296c85b7d8f2644469bfba64e902c367
font_01_sfnt_off00010915.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10915 10724 bytes
SHA-256: 42fafbd8cee589d119236c546169e1b09807697210368f547fbed48485d04176
font_02_sfnt_off00012dbb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12DBB 16204 bytes
SHA-256: 532315dfdc59b350d447ad91845dd8cc72a836e684f536ab9a4305dc5b53fb8e