Malicious PDF — malware analysis report

Static analysis result for SHA-256 76f8193298d878ca…

MALICIOUS

PDF

74.5 KB Created: 2021-04-01 06:09:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: d816c02d7593214919169e9bba9f7153 SHA-1: 1ede39e1119ab4859b23b7d873bb7bf163d45399 SHA-256: 76f8193298d878cac74904e7289f63b123154177d73c69c65a60317b5c0c5413
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://jacksth.ru/aws?utm_term=d%2526d+classes+and+races PDF link annotation
    • http://nozatisesufi.scienceontheweb.net/51226085691.pdfIn PDF document text
    • http://lnstagramlivesupportcenter.com/girl_interrupted_streaming_itak8nww.pdfIn PDF document text
    • http://redpandarecycling.com/harman_pellet_stove_dealers_in_marylandlpjxd.pdfIn PDF document text
    • https://cdn.sqhk.co/juvanejejuwo/ahfhaig/fotulumifinorepolanerazav.pdfIn PDF document text
    • https://cdn.sqhk.co/posiraki/MFcitij/bootstrap_4_basic_html_template.pdfIn PDF document text
    • https://cdn.sqhk.co/botonerepap/phaiaZW/instagram_story_viewer.pdfIn PDF document text
    • http://zevewidojodot.mywebcommunity.org/wavixorojebok.pdfIn PDF document text
    • http://gipogup.sportsontheweb.net/troy_bilt_tb575ec_carburetor_rebuild_kit.pdfIn PDF document text
    • https://cdn.sqhk.co/kerametunal/eftichh/gioco_dama_online_2_giocatori.pdfIn PDF document text
    • http://deutschebank-meine.com/c_programming_from_problem_analysis_to_program_design_solution_manual7c0jm.pdfIn PDF document text
    • http://kedamijofulufep.mygamesonline.org/rozasajekofozalujilufara.pdfIn PDF document text
    • https://cdn.sqhk.co/vuzowadijavu/wD2Whfn/battlefield_heroes_gameplay_pc.pdfIn PDF document text
    • http://damewumesigalut.medianewsonline.com/guided_meditation_script_nature.pdfIn PDF document text
    • http://jolijivik.scienceontheweb.net/72009730061.pdfIn PDF document text
    • https://cdn.sqhk.co/wepunajexiju/e6PBOgi/savusedafuw.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://2f60c0de-bae8-48d8-8f3f-ce7907f87c52.filesusr.com/ugd/badafb_c4143e6d6552496e9cba3efaeae80072.pdf?index=trueIn PDF document text
    • https://1423d76f-a56f-4481-bf87-726e17039346.filesusr.com/ugd/14aee2_05d8f3e0b7fe46768a60673755cb7f88.pdf?index=trueIn PDF document text
    • https://5071cc05-3fa2-46b1-b944-d2523ca4b51d.filesusr.com/ugd/62e2c1_e1fb6f87b80c41d0829f9250b618f343.pdf?index=trueIn 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eb18.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB18 4156 bytes
SHA-256: 5ae3bcc49c87f96444fbe3d11ff27db43b6aea299416b9f3d286273c64098da8
font_01_sfnt_off0000f946.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF946 10700 bytes
SHA-256: 76f6c8889bd82ddac1003adc388a64c0793443124160e8b67a2d1a7803eabb88

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