Malicious PDF — malware analysis report

Static analysis result for SHA-256 f76534ac023a5b2c…

MALICIOUS

PDF

74.7 KB Created: 2021-04-06 15:27:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6e8f8fdba9579b08847a5061a8beeda7 SHA-1: 20d1d9aabbcfc14dab68989297995e96add316b4 SHA-256: f76534ac023a5b2ca37a81eb89470b0108f6fc17e833eff1d0dc76ffd93a6d7c
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF file contains numerous external links, a technique often used in SEO link farms or phishing campaigns. The heuristic 'SE_ADVANCE_FEE_SCAM_LURE' indicates the document's content is designed to trick users into believing they will receive a prize or parcel, which is a common advance-fee fraud tactic. The presence of multiple suspicious URLs, including those pointing to potential malware distribution or phishing sites, further supports this assessment. No scripts were extracted, but the PDF structure itself is indicative of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 6

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • 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://resalured.ru/strik?utm_term=new+restaurant+near+walt+whitman+mall
    • https://cdn.sqhk.co/tatogevi/Jghjj5F/kusakijewirojebi.pdf
    • http://kulinar2020.site/274256288bguwl.pdf
    • http://topsalon.xyz/behringer_eurorack_ub802_price7i0cn.pdf
    • https://cdn.sqhk.co/mabuviko/hif6pha/honda_crosstour_2010_owners_manual.pdf
    • https://jasefeneg.weebly.com/uploads/1/3/4/4/134489721/7782ffacaaa398.pdf
    • https://cdn.sqhk.co/vasibejovej/jbjdgep/82513515341.pdf
    • http://avtoshtorki.shop/53020183600vbp8d.pdf
    • http://4338bacchus.com/chess_openings_pgn_database_downloadrhmg8.pdf
    • https://zomujowedava.weebly.com/uploads/1/3/4/6/134629266/1a4f11936.pdf
    • https://cdn.sqhk.co/vagewovupug/VCCWRmM/posoxasuga.pdf
    • https://nimidakotogala.weebly.com/uploads/1/3/0/8/130874585/dobakapapobolof.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/voropa/microsoft_word_table_of_contents_page_numbers_not_aligned.pdf
    • https://s3.amazonaws.com/zowibatev/berliner_platz_neu_1.pdf
    • https://94aa8f26-b07a-4c24-bdb4-4112657565c9.filesusr.com/ugd/37428b_f8cab67b58534a22bf40b5cc8493d203.pdf?index=true
    • https://s3.amazonaws.com/pasawexawinogad/how_much_to_lease_a_jeep_grand_cherokee_overland.pdf
    • https://s3.amazonaws.com/kovilowab/kipajudir.pdf
    • https://s3.amazonaws.com/dozore/zajetuxekabusojabukitexom.pdf
    • https://s3.amazonaws.com/zizene/jizuve.pdf
    • https://s3.amazonaws.com/zabevog/befatabopogeroxa.pdf
    • https://s3.amazonaws.com/kalanejaxutilif/anker_soundcore_liberty_neo_wireless_manual.pdf
    • https://s3.amazonaws.com/duzexefemosaxe/inheritance_dani_shapiro_book_club_questions.pdf
    • https://s3.amazonaws.com/kavifunaruvi/1_year_calendar_template_excel.pdf
    • https://fa53e508-d88d-41cb-897c-7a5b6f1bfcc3.filesusr.com/ugd/361045_5d921d496e7d446aa1f709c75965bba8.pdf?index=true
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e5f6.bin
335f7515e991f6555667d488c416a9636445526b6bc2b5518fa79970becf955e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE5F6 4984 bytes
font_01_sfnt_off0000f6d1.bin
23ac5aed0eed69eaf933ab0d8a868ea651bad2d9a81613388c1a5517e851d06f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF6D1 11180 bytes

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