Malicious PDF — malware analysis report

Static analysis result for SHA-256 2f5ad9687e4c90a3…

MALICIOUS

PDF

84.4 KB Created: 2021-03-28 17:50:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 95237a2760091411b4e949af617f39af SHA-1: 24919b175a2858d003500e44e5c65539ede10df7 SHA-256: 2f5ad9687e4c90a3c728c7b02f114fb4dfbfb748d70bbd0b46480b8629c71d65
126 Risk Score

Malware Insights

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

The PDF contains numerous external URLs, with heuristics indicating it functions as a link farm hosted on disposable domains. ML and ClamAV detections confirm its malicious nature, classifying it as a phishing or trojan variant. The embedded URLs suggest an attempt to redirect users to malicious sites, likely for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://jottigo.ru/award?keyword=afasia+talamica+pdf PDF link annotation
    • https://cdn.sqhk.co/ripalufix/D4skaic/bisuvelepipaxolo.pdfIn PDF document text
    • http://uscreditmonitoring.info/tomet76p8e.pdfIn PDF document text
    • https://cdn.sqhk.co/fefamuve/ghgdLja/10000_pop_quiz.pdfIn PDF document text
    • http://natnat.fun/tevevidodanenojapele8wj5t.pdfIn PDF document text
    • https://cdn.sqhk.co/gixotagokezu/eghggSO/sidofukulumu.pdfIn PDF document text
    • https://cdn.sqhk.co/kupodakojav/Jig8X99/hallmark_movie_called_christmas_list.pdfIn PDF document text
    • http://help-nanny.site/98675419813vo5gb.pdfIn PDF document text
    • https://cdn.sqhk.co/bulixanejad/aWzQhim/history_of_ganoderma_lucidum.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367297/normal_6056f36783239.pdfIn PDF document text
    • http://complerbnp.com/gatexozadoweroborosenukuyiyn.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365576/normal_605914fd4761f.pdfIn PDF document text
    • http://topvideo.design/onn_universal_remote_code_for_sanyo_dvd_playerxnv6y.pdfIn PDF document text
    • http://goxezidoge.22web.org/camminiamo_sulla_strada.pdfIn PDF document text
    • http://fullcreditreport.info/vunibm795v.pdfIn PDF document text
    • https://cdn.sqhk.co/botikavanov/dhxjfqk/zara_cyber_monday_usa.pdfIn PDF document text
    • https://cdn.sqhk.co/mivadunoxo/iPB1oOz/28930255233.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4457586/normal_5fd9dd8024f58.pdfIn PDF document text
    • http://clubstore.info/zawaro8i013.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4477637/normal_5fe796a345952.pdfIn PDF document text
    • https://cdn.sqhk.co/doxelatofon/8jhjcge/custom_design_flat_pack_furniture.pdfIn PDF document text
    • http://gnfcns.info/39933584070isfke.pdfIn PDF document text
    • http://nosetibadap.iblogger.org/guwilexudifexa.pdfIn PDF document text
    • http://usesucre.pro/what_questions_do_employers_ask_at_second_interviewsf2s3y.pdfIn PDF document text
    • https://cdn.sqhk.co/zimalodepafo/TZjbhdE/pevapod.pdfIn PDF document text
    • https://cdn.sqhk.co/migukosodaza/CJhfICh/usborne_colorful_world_construction_site.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://bumojomoso.rf.gd/10015649328.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f28e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF28E 5196 bytes
SHA-256: ff8134b1ffffe3f526e58bcfe4b23d84de3b651102553b46b80ca4be7381cd7a
font_01_sfnt_off00010431.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10431 13108 bytes
SHA-256: 9f160b65f11a7a2b4d4c31f8fa49264375e76ccf696448b1403edbf4de65dac6
font_02_sfnt_off00012d31.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12D31 16112 bytes
SHA-256: 95f2fdc14a2f8cdda26bb26952e7a895a0664b32aa7fdea2361ed6ab83a5ffeb