Malicious PDF — malware analysis report

Static analysis result for SHA-256 6c8fa67098639c0d…

MALICIOUS

PDF

69.0 KB Created: 2021-02-25 01:24:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-07
MD5: af130f3dccdf59c45634e4aaa623e1ee SHA-1: c81b646fd332c4b8d3d2e5c0d6240877026143f6 SHA-256: 6c8fa67098639c0de22328654fe3e9bcf2f6de2ea2d73a7b255d51a0ffab5cf1
186 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many hosted on disposable domains, suggesting a link farm or SEO spam operation. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware distribution. While no scripts were extracted, the PDF structure and numerous external URLs point towards an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://jottigo.ru/award?keyword=gemini+security+system+door+chime PDF link annotation
    • https://cdn.sqhk.co/zolewiko/hjggZl1/10410858886.pdfIn PDF document text
    • https://cdn.sqhk.co/sisowufabo/IhbjbdY/wedding_cake_decorations_flowers.pdfIn PDF document text
    • https://cdn.sqhk.co/rujiwujik/hbLSt0e/train_drive_ats_3_mod_apk.pdfIn PDF document text
    • http://voxemukam.22web.org/change_in_quantity_demanded_worksheet.pdfIn PDF document text
    • https://nunesevafarub.weebly.com/uploads/1/3/0/8/130874378/jelebomirog_kazet.pdfIn PDF document text
    • https://durirumis.weebly.com/uploads/1/3/3/9/133999752/1197919.pdfIn PDF document text
    • https://cdn.sqhk.co/wufevinek/iggcggi/fitex.pdfIn PDF document text
    • https://cdn.sqhk.co/nolagutotato/PTuvidK/bepadu.pdfIn PDF document text
    • https://cdn.sqhk.co/feziwetesene/jjjD2rl/zomajudekozube.pdfIn PDF document text
    • https://cdn.sqhk.co/takabalal/hABjbai/59678502820.pdfIn PDF document text
    • https://cdn.sqhk.co/marebilan/1nKjjhf/kanto_yu4_vs_edifier_r1700bt.pdfIn PDF document text
    • https://cdn.sqhk.co/dutararopat/pjcibhi/shop_bet9ja_old_mobile_app_download.pdfIn PDF document text
    • http://wivuperafuzo.mypressonline.com/the_lord_of_the_rings_the_hobbit_book_review.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zafurug.epizy.com/king_platform_bed_with_storage_ikea.pdfIn PDF document text
    • https://s3.amazonaws.com/davubewu/bakifevelodovedetubozex.pdfIn PDF document text
    • https://s3.amazonaws.com/fifomi/menavus.pdfIn PDF document text
    • https://s3.amazonaws.com/radubozufiwo/what_is_corporate_identity_in_graphic_design.pdfIn PDF document text
    • https://s3.amazonaws.com/zozofufulolig/secure_vpn_for_android_2.pdfIn PDF document text
    • http://sizuzupapefapo.epizy.com/acas_managing_gender_pay_gap_reporting.pdfIn PDF document text
    • https://s3.amazonaws.com/wiremeresegikon/how_to_tie_a_robe_dress.pdfIn PDF document text
    • http://zivuneko.epizy.com/apple_iphone_5_5s_se_leather_case_midnight_blue.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_off0000d3a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD3A7 5068 bytes
SHA-256: 501bdde2cb222f2efd853e5baf0e250032552f3923da98f96b22c5ea7529be07
font_01_sfnt_off0000e4c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4C4 9884 bytes
SHA-256: 4cc66581c64a7e51fdd8c1e4f45322a48e5fff8c8b961d205c3e2243c89d716a

Open this report in the interactive analyzer, or submit your own file for analysis.