Malicious PDF — malware analysis report

Static analysis result for SHA-256 6ecb5627ecf9c556…

MALICIOUS

PDF

83.0 KB Created: 2021-03-16 22:16:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: edc7c0d519f2e89b8a8cf7e5108a2c61 SHA-1: 5f5f3a0b4adf9c7ac1cd41ba2477465c7ef0f6a0 SHA-256: 6ecb5627ecf9c5561ad4d9d1671bc9e1808b0ad3b55406433d535a2eaf2a3b1d
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 0.9995

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://maypoin.ru/strik?utm_term=how+to+detect+nmap+with+wireshark PDF link annotation
    • https://cdn.sqhk.co/viwiratoposu/lhiPZhg/94070339097.pdfIn PDF document text
    • http://bostpolamos.site/lovulimopoxojdb6m.pdfIn PDF document text
    • http://idealica-official-it.website/error_code_3253_outlookk35q5.pdfIn PDF document text
    • https://cdn.sqhk.co/gujadozede/hcvgicn/wufezajobedojijosomuwavax.pdfIn PDF document text
    • https://cdn.sqhk.co/sodelaranu/bigQujc/airplane_model_kits_that_fly.pdfIn PDF document text
    • https://cdn.sqhk.co/molavagew/edEhge9/infinity_song_band_members.pdfIn PDF document text
    • https://cdn.sqhk.co/zupuguvawaj/fghMQhg/assassin_and_master_thief_full_movie_download.pdfIn PDF document text
    • http://masito.space/what_is_the_definition_of_justice_in_ethicspqb8z.pdfIn PDF document text
    • https://cdn.sqhk.co/gukisafuw/djaQjjl/immortality_bee_gees_piano_sheet_music.pdfIn PDF document text
    • https://cdn.sqhk.co/bugolajoxodu/aib4uHd/10655397386.pdfIn PDF document text
    • https://jupifezugaj.weebly.com/uploads/1/3/0/7/130739886/3075254.pdfIn PDF document text
    • http://epaytds.xyz/europa_report_alieng3ldh.pdfIn PDF document text
    • https://cdn.sqhk.co/bakimexatura/d4yIjdT/rozanaxikezube.pdfIn PDF document text
    • https://sisaweroz.weebly.com/uploads/1/3/4/5/134587393/niwezokuwamuxa.pdfIn PDF document text
    • https://cdn.sqhk.co/rinugezig/nYicgfe/play_hungry_shark_evolution_online_for_free.pdfIn PDF document text
    • https://cdn.sqhk.co/lilapanorup/bM9hege/games_like_zombie_defense_for_ios.pdfIn PDF document text
    • https://bupotovivo.weebly.com/uploads/1/3/3/9/133986694/dutipoxisobiruki.pdfIn PDF document text
    • https://cdn.sqhk.co/zuxolusufa/jPqLvgj/76817216021.pdfIn PDF document text
    • http://idealslim-italiaofficial.site/example_of_thank_you_letter_for_teachers_dayw5gw0.pdfIn PDF document text
    • https://cdn.sqhk.co/wirubetena/ijmbRhd/real_drift_car_racing_mod_free_download.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://vajexakatozezal.epizy.com/dangling_modifier_worksheets_7th_grade.pdfIn PDF document text
    • http://lozomijot.rf.gd/79879673918.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f803.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF803 5400 bytes
SHA-256: d5bd258a905d00f779e8c708339e89faa8bfd90fe0ce9e5d38b412765edd3304
font_01_sfnt_off00010a34.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A34 3020 bytes
SHA-256: 52525c54889d3706ba715c32fd680f2fbb23dd2e45d43cafb20371fc68b0a45f
font_02_sfnt_off00011670.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11670 11676 bytes
SHA-256: 645af28486a6e38c1faecc5926f591fc13b954d94982148d1bb7ab0cecbad80a

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