Malicious PDF — malware analysis report

Static analysis result for SHA-256 e87bda593d60455d…

MALICIOUS

PDF

79.1 KB Created: 2021-03-02 11:43:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-16
MD5: 863e766fa124df9cb3cf591936010aef SHA-1: 803acb315b9bf90111b4dced3e1c77ad6858d84e SHA-256: e87bda593d60455d835f4a37c59b931733b40f1c0a631da82e6b5f075e1f5994
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic, suggesting a link farm or phishing attempt. The ML classifier and ClamAV detection strongly indicate maliciousness. While no scripts were directly extracted, the embedded URLs are the primary indicators of malicious activity, likely leading to further compromise or information theft.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • 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://vilenefex.ru/strik?utm_term=how+to+roast+a+turkey+electric+roaster PDF link annotation
    • http://smirno.life/how_to_change_standard_form_equations_into_slope_intercept_formp1l9y.pdfIn PDF document text
    • https://cdn.sqhk.co/naziwixolagu/0hgPibC/arcade_family_chromecast_games_tv.pdfIn PDF document text
    • http://mazers.fun/92919294864oukd8.pdfIn PDF document text
    • https://cdn.sqhk.co/potiribuwuf/jgOhihj/86640410692.pdfIn PDF document text
    • https://cdn.sqhk.co/lidupusumoj/heQT5jh/school_driving_3d_hack_ios.pdfIn PDF document text
    • https://cdn.sqhk.co/jomenuluz/7lOayOK/56265050779.pdfIn PDF document text
    • https://cdn.sqhk.co/jabosuve/hBFhf5x/grand_city_road_construction_2_highway_builders.pdfIn PDF document text
    • http://tehnotop.store/body_for_life_book_kindlep5fv9.pdfIn PDF document text
    • https://cdn.sqhk.co/derepinejabi/NrnhjX8/8336735274.pdfIn PDF document text
    • http://snegny.com/aha_2017_hypertension_guidelineswxf7l.pdfIn PDF document text
    • https://cdn.sqhk.co/wexovezojab/ihfzfji/sudoku_6x6_hard_with_answers.pdfIn PDF document text
    • https://cdn.sqhk.co/retuwami/gd0hj4X/epic_game_launcher_not_working_pc.pdfIn PDF document text
    • https://cdn.sqhk.co/dixobiwi/SiahggD/all_beauty_voucher_code_2019.pdfIn PDF document text
    • https://cdn.sqhk.co/nezotelo/jifLjgK/70964277216.pdfIn PDF document text
    • https://rapexukiwivusa.weebly.com/uploads/1/3/4/8/134856806/xovopipupabosijib.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/zuvovoxigumuz/lolirabop.pdfIn PDF document text
    • https://s3.amazonaws.com/godoremitiwuja/5058743319.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_off0000eff7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFF7 5012 bytes
SHA-256: d2f6ec8b63677814a0db737b3c5c214f8007183d33228e6cb7a93b38b5cbaebb
font_01_sfnt_off0001011e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1011E 1800 bytes
SHA-256: a36eee06fef6ce219692c4ec918276ac99413e4fd1e3666e4031624f9289d620
font_02_sfnt_off000109ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109AB 10976 bytes
SHA-256: 392e6bc45b23c6d8aac06d457d4033b6d5869ea6b3db05c5b1085d07a6c889bd

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