Malicious PDF — malware analysis report

Static analysis result for SHA-256 32e9d90cc6de4fb0…

MALICIOUS

PDF

81.0 KB Created: 2021-04-04 13:08:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d35b3f773f89a968fc8daa239cef96b2 SHA-1: 85b83e1e714d6997691f3c1c25025e0725b114b1 SHA-256: 32e9d90cc6de4fb023f5baae3fecf95e8fc17d0becd8e31a3df2e66e04a30670
116 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The presence of an external URI pointing to 'pelibifir.ru' suggests a phishing or malware distribution attempt. The 'SE_CALLBACK_LURE' heuristic further supports a phishing pretext, likely aiming to trick users into visiting the malicious URL for further compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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://pelibifir.ru/wix?keyword=the+lost+hero+read+online+pdf
    • http://sipataj.sportsontheweb.net/13867225632.pdf
    • http://bumawusuka.mypressonline.com/62921081978.pdf
    • http://nat-yoga.space/894243751559pucr.pdf
    • http://vixitatevejiwo.getenjoyment.net/9650387557.pdf
    • http://shop-kid-toys.online/699577647642duxh.pdf
    • http://jaralet.getenjoyment.net/parasomnias_en_nios.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://uploads.strikinglycdn.com/files/c63f33e3-0f8b-4703-ada2-63773a13f1d5/balituvugefipuv.pdf
    • https://s3.amazonaws.com/tirimofufemukat/perorosuxenuxupuwokof.pdf
    • https://s3.amazonaws.com/rupatojuko/programmable_logic_controller_plc_vs_microcontroller.pdf
    • http://koduwutuvage.onlinewebshop.net/nararapagetofijet.pdf
    • https://s3.amazonaws.com/rejiner/microsoft_publisher_id_card_template.pdf
    • https://s3.amazonaws.com/lorifawuvawot/14019826175.pdf
    • https://uploads.strikinglycdn.com/files/ee55e4c8-1207-4300-b66b-40293330a7d4/18225621748.pdf
    • https://uploads.strikinglycdn.com/files/17d90d83-bc9e-4c86-99b1-6b961976e0c0/food_list_for_dash_diet_phase_1.pdf
    • https://s3.amazonaws.com/xoxaneral/tigoxubat.pdf
    • https://s3.amazonaws.com/genedonapubefe/animal_farm_book_summary_short.pdf
    • https://uploads.strikinglycdn.com/files/32754d36-55ec-41ff-8d5d-11867e2b49a1/98424508366.pdf
    • https://s3.amazonaws.com/kuxuxemu/baby_shower_invites_girl_template.pdf
    • https://uploads.strikinglycdn.com/files/467b00b7-4030-4f09-b806-28485fc4af64/86029421940.pdf
    • https://s3.amazonaws.com/lekizopiloref/99105568795.pdf
    • https://uploads.strikinglycdn.com/files/46fad695-26ed-43df-8d11-00607f67f936/what_is_the_meaning_of_the_word_career_development.pdf
    • 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ef5f.bin
5bca49f291a765d3fc2357ab8dc2d56c0797f5e5800cb1021741993376d31f37		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEF5F 4868 bytes
font_01_sfnt_off0000ffd6.bin
6100ea2b67e903623c56498e0a56a426f609e00f534f25cae3385d5eb2b1c5d9		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFFD6 11664 bytes
font_02_sfnt_off00012758.bin
a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12758 4324 bytes

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