Malicious PDF — malware analysis report

Static analysis result for SHA-256 3f21c056e464ae0e…

MALICIOUS

PDF

94.3 KB Created: 2021-04-03 11:55:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 873fae8bdfe767b90629960b17d0ec7c SHA-1: 113bc022be2220d792aecfa60ef3460abc93abec SHA-256: 3f21c056e464ae0e9de8c456a2bf8e3d2fc287ec01f5cb26ace63e03d509e308
104 Risk Score

Malware Insights

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

The PDF document contains an embedded URL that leads to a domain associated with phishing lures. The heuristic 'SE_INVOICE_LURE' suggests the document's content is designed to trick the user into clicking the link, which is further supported by the presence of 'Information technology support specialist resume' in the document body. ClamAV detection and ML classification confirm the malicious nature of the file.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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://midufefew.ru/strik?utm_term=information+technology+support+specialist+resume PDF link annotation
    • https://cdn.sqhk.co/gupuwiwi/QZigQMz/gapowaxi.pdfIn PDF document text
    • http://norusezuluwo.iblogger.org/parliamentary_debate_format.pdfIn PDF document text
    • https://cdn.sqhk.co/vopofuxo/pzjjp1Y/12823701287.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4479691/normal_5fcd0cfd81ba1.pdfIn PDF document text
    • http://didanak.22web.org/texobazalisu.pdfIn PDF document text
    • https://cdn.sqhk.co/rosavuzezig/JifXW8o/42620878205.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476595/normal_605d6cc57a725.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/db4970dd-d824-4962-b90b-ff38f73c94bd/god_is_redeemer_verse.pdfIn PDF document text
    • https://s3.amazonaws.com/sukedil/pharma_maintenance_engineer_interview_questions_and_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/aba87261-f7d7-4d4f-b674-77e1bf70bb54/par-q_and_you_answer_key.pdfIn PDF document text
    • http://jezagap.epizy.com/simile_metaphor_personification.pdfIn PDF document text
    • https://s3.amazonaws.com/jagux/alternative_medicine_apps.pdfIn PDF document text
    • https://s3.amazonaws.com/remeranexe/auto_start_manual_car.pdfIn PDF document text
    • http://mexadanizim.rf.gd/amoxicilina_usos.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2293d94b-15a3-4402-b218-1c93a8ed17ce/zevexelu.pdfIn PDF document text
    • http://vaduxovogemuke.epizy.com/mezefabujoninuwakojokoxid.pdfIn PDF document text
    • https://s3.amazonaws.com/dukajevo/oecd_guidelines_for_testing_of_chemicals_ppt.pdfIn PDF document text
    • https://s3.amazonaws.com/sugowubuf/18_movies_2018_hollywood_in_tamil.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8b1b8383-4ada-47f5-bfa2-3b4ed0fe3210/62979130200.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f22b139b-aced-49d6-8370-6d237c9897d2/is_dvr_free_with_comcast.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011c57.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C57 2856 bytes
SHA-256: 284ef71c14a8c0ded8b0c7b12ef8f655933f9bb168caa2190f9d5916b255f905
font_01_sfnt_off00012680.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12680 5352 bytes
SHA-256: 552a8fee78f1c7847831423ccd4632cceeb9779a46d3617c684f5983dca576b6
font_02_sfnt_off0001388c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1388C 10720 bytes
SHA-256: aa961d9ad1b1a1394ca623d8cbdb62eaa6af26e99b0808a577eac8e00261dd96
font_03_sfnt_off00015d17.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15D17 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

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