Malicious PDF — malware analysis report

Static analysis result for SHA-256 7d554018f1e78c61…

MALICIOUS

PDF

87.4 KB Created: 2021-01-23 18:07:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 6a6b46e2b6581d758e9dd117cc9715d2 SHA-1: 7636121efba4555a3faf6e1e5693e7efdc2d0c08 SHA-256: 7d554018f1e78c610887211112a2feb74c1d1e861752fdd1f7af8476ba0f803e
126 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. The document contains numerous embedded URLs, many of which are hosted on disposable domains and appear to be part of a link farm, suggesting a phishing or malware distribution scheme. The presence of 'utm_term' parameters in some URLs further supports the idea of tracking user engagement with deceptive content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://baarspo.ru/123?utm_term=que+leon+movie+watch+online+free PDF link annotation
    • https://cdn.sqhk.co/potasuregoz/Kji0sRH/kidobugazonon.pdfIn PDF document text
    • https://cdn.sqhk.co/rozopebak/hgPchjk/20292173962.pdfIn PDF document text
    • https://site-1166608.mozfiles.com/files/1166608/award_show_2013_bollywood.pdfIn PDF document text
    • https://site-1223352.mozfiles.com/files/1223352/77744685449.pdfIn PDF document text
    • https://site-1173450.mozfiles.com/files/1173450/tasekolemurojilorebibimaz.pdfIn PDF document text
    • https://site-1168324.mozfiles.com/files/1168324/the_maze_runner_2014_full_movie_download.pdfIn PDF document text
    • https://site-1168430.mozfiles.com/files/1168430/injustice_gods_among_us_mobile_free_characters.pdfIn PDF document text
    • https://jigaposu.weebly.com/uploads/1/3/5/3/135397088/ad766d212a613a.pdfIn PDF document text
    • https://site-1180896.mozfiles.com/files/1180896/jabetamixifej.pdfIn PDF document text
    • https://site-1204117.mozfiles.com/files/1204117/jawodakivowisafuvolufus.pdfIn PDF document text
    • https://cdn.sqhk.co/nazopekujavi/ifhiBic/15918818812.pdfIn PDF document text
    • https://site-1175574.mozfiles.com/files/1175574/dosagunikemo.pdfIn PDF document text
    • https://site-1174461.mozfiles.com/files/1174461/40655057305.pdfIn PDF document text
    • https://site-1178449.mozfiles.com/files/1178449/car_media_player_baixar.pdfIn PDF document text
    • https://site-1168148.mozfiles.com/files/1168148/livowamuro.pdfIn PDF document text
    • https://site-1172860.mozfiles.com/files/1172860/92444338405.pdfIn PDF document text
    • https://site-1168030.mozfiles.com/files/1168030/pokemon_trainer_club_unable_to_authenticate_android.pdfIn PDF document text
    • https://vurofagulomefu.weebly.com/uploads/1/3/1/4/131452840/kobesomi.pdfIn PDF document text
    • https://site-1177005.mozfiles.com/files/1177005/bebas_font_family_free.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
    • 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010b44.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B44 5040 bytes
SHA-256: cfdf742394248ca6c15c1103acae9915a1a24b921a6335c169e55f6c67c18aba
font_01_sfnt_off00011c4e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C4E 11076 bytes
SHA-256: b72f6b9cb4fe1875219e668a807ab5cba28ba3bb37739f132269a81f416d2716
font_02_sfnt_off000141bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x141BC 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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