Malicious PDF — malware analysis report

Static analysis result for SHA-256 e68f71066791b7ae…

MALICIOUS

PDF

84.7 KB Created: 2021-03-30 14:51:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 86b30cf5446787d54a1d95be66b39932 SHA-1: 8f4fd9b270536f2d8a39ada0879452dd334cf09b SHA-256: e68f71066791b7aec0c5927fcdc1b7ef66df06b9c62d01cbf60949829d88b87c
186 Risk Score

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 0.9998

Heuristics 6

  • 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 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://lozipotod.ru/award?keyword=catalogue+design+pdf+free+download PDF link annotation
    • https://cdn.sqhk.co/tetaxekumipi/IhglYyy/woodworkers_guild_of_america.pdfIn PDF document text
    • http://muvirire.22web.org/bioplastics_project.pdfIn PDF document text
    • https://zagibekopawof.weebly.com/uploads/1/3/1/4/131453283/3f22f047d9570.pdfIn PDF document text
    • https://cdn.sqhk.co/fisoxinizo/pIwjdgf/fokunabizuzeziwed.pdfIn PDF document text
    • https://cdn.sqhk.co/tasokuxu/jbigjgd/99641854986.pdfIn PDF document text
    • https://cdn.sqhk.co/fumediju/jgjehaW/50882768064.pdfIn PDF document text
    • https://mefufexuwi.weebly.com/uploads/1/3/4/0/134019004/toravadefum.pdfIn PDF document text
    • http://dusakopu.iblogger.org/carry_on_my_wayward_son_supernatural_finale_song.pdfIn PDF document text
    • https://fatilisuwojumo.weebly.com/uploads/1/3/4/6/134652656/3920410.pdfIn PDF document text
    • http://supernefritroller.xyz/vamis7i86e.pdfIn PDF document text
    • https://cdn.sqhk.co/kojetozativ/jigdgSm/pupevexulukagaferizo.pdfIn PDF document text
    • http://madamzero.com/se_ha_perdido_el_pueblo_mexica_analisisr65dq.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/wexoteluwag/70527148037.pdfIn PDF document text
    • http://dixisafujanen.rf.gd/cheekati_gadilo_chithakotudu_movie_tamilrockers.pdfIn PDF document text
    • http://tobavukopipe.epizy.com/blank_book_template_with_lines.pdfIn PDF document text
    • https://s3.amazonaws.com/vigevot/52801556397.pdfIn PDF document text
    • http://joluror.rf.gd/33063557629.pdfIn PDF document text
    • https://s3.amazonaws.com/wulotugadag/what_are_you_up_to_now_answer.pdfIn PDF document text
    • https://s3.amazonaws.com/vajefam/gndu_date_sheet_ba_3rd_sem_2019.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_off00010cfe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10CFE 5208 bytes
SHA-256: 15ba0bb6ac283ead7a7a8bf02d325dad3bc487a2d8038deddd73b22f4d6adcd3
font_01_sfnt_off00011ed4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11ED4 10912 bytes
SHA-256: 16d6323acc87867043f486f4b4c4ea91c7ac3a4205b3f788d884484eaa298491

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