Malicious PDF — malware analysis report

Static analysis result for SHA-256 f91199d7a8c45dab…

MALICIOUS

PDF

78.7 KB Created: 2021-03-29 23:47:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 6bd04dcc6c3439be8ca6f744b91d31b2 SHA-1: 11d4fcf24ffb9aa42edee6fcb3fa41cb607276c0 SHA-256: f91199d7a8c45dab5bde6c7de91a2f644ea106916a9300ac08d49afaf134ef0f
96 Risk Score

Malware Insights

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

The file is a PDF document flagged as malicious by ML classifiers and ClamAV. It contains an embedded URI pointing to a suspicious domain, likely intended to redirect the user to a malicious site. The document body is heavily obfuscated, but the presence of external URIs suggests a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://dugedepap.ru/strik?utm_term=the+norton+field+guide+to+writing+with+readings+4th+edition+citation PDF link annotation
    • https://cdn.sqhk.co/ranemagesoga/JhdLhgr/stick_fight_shadow_warriors.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379859/normal_6009c6e6637a4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445541/normal_601841e0239aa.pdfIn PDF document text
    • http://xarapen.22web.org/lazulevaji.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4383322/normal_5fccea6c2f212.pdfIn PDF document text
    • https://cdn.sqhk.co/wujakegu/ajhYjic/62802961936.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/tizowodifi/c_o_c_game_hack_version.pdfIn PDF document text
    • http://tasefabomodewiv.epizy.com/new_bollywood_movies_2016_full_movie.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c27911c0-4074-424d-b733-e02b09e3bf6b/eternal_water_heater_gu195s_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/jusuberu/what_is_the_final_stanza_in_a_poem.pdfIn PDF document text
    • https://s3.amazonaws.com/kudowo/6805164886.pdfIn PDF document text
    • http://talizojewebovob.rf.gd/aashto_pavement_design.pdfIn PDF document text
    • https://s3.amazonaws.com/wixamupelinere/11558069266.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/07547cf3-88fe-41c9-b187-aa56ff044b11/damuzo.pdfIn PDF document text
    • http://kamegowemegoguw.rf.gd/tolewape.pdfIn PDF document text
    • https://s3.amazonaws.com/xasovewipeje/52054640631.pdfIn PDF document text
    • http://kebodilumikida.rf.gd/varujosoxorolurujizo.pdfIn PDF document text
    • https://s3.amazonaws.com/nevovumowa/41661627993.pdfIn PDF document text
    • https://s3.amazonaws.com/fujadabez/russian_revolution_worksheet_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/juduk/kofazorexubabezepegi.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_off0000d9db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9DB 5412 bytes
SHA-256: 0078fa77262e070a7e545595d7523b6491ddbf94704a2597b115f1cb889084a2
font_01_sfnt_off0000ec53.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC53 12020 bytes
SHA-256: a1dd67ae3e2ffad7a881028c0a1987c1dc398be5e652cb6eaefb27eef9466b8e
font_02_sfnt_off000114f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x114F3 16084 bytes
SHA-256: 7bb111f4ce79ba48502a837b83d40e55cd246b86015b702aadb01736ca16f5d3

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