Malicious PDF — malware analysis report

Static analysis result for SHA-256 866f3c98cac5bc18…

MALICIOUS

PDF

82.5 KB Created: 2021-03-17 05:52:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: dc74b87a451b246cb3a357df460a8f52 SHA-1: 25791a4d7c8107b741d63b9e6345ac74d2b8c4e0 SHA-256: 866f3c98cac5bc18a3e4b6a79c0a985a5d94d44a79832c28e6666b8497c517b8
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URI pointing to a suspicious domain, which is likely part of a phishing or malware distribution scheme. The ML classifier and ClamAV detection strongly indicate malicious intent. Although no scripts were explicitly extracted, the presence of an external URI suggests the document is designed to redirect the user to a malicious site, likely for downloading a payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9978

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://dafemum.ru/strik?utm_term=dnd+5e+players+handbook+download
    • https://cdn-cms.f-static.net/uploads/4464996/normal_60178c35f0c51.pdf
    • https://static.s123-cdn-static.com/uploads/4460725/normal_5ff086bc0daa3.pdf
    • https://static.s123-cdn-static.com/uploads/4489740/normal_5ff97075bc5d0.pdf
    • http://bageker.iblogger.org/time_capsule_questions_for_friends.pdf
    • https://cdn-cms.f-static.net/uploads/4530429/normal_5fd0dc0802849.pdf
    • https://static.s123-cdn-static.com/uploads/4384482/normal_5ffdc3b5340e8.pdf
    • http://tasonilevibinu.22web.org/90101167375.pdf
    • https://static.s123-cdn-static.com/uploads/4420906/normal_5ffbb01085855.pdf
    • https://cdn-cms.f-static.net/uploads/4416331/normal_6037cd2bb14de.pdf
    • https://cdn-cms.f-static.net/uploads/4444657/normal_603f17a0df3a4.pdf
    • https://cdn-cms.f-static.net/uploads/4486353/normal_603d8d8b37161.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://s3.amazonaws.com/viregujipowuru/51678562061.pdf
    • https://s3.amazonaws.com/fumiposamisur/ruwusejalolutanagorulig.pdf
    • https://s3.amazonaws.com/luxaduzimase/96314447.pdf
    • http://vonimamodiji.rf.gd/vuvegiwuxuxiworevebadel.pdf
    • https://s3.amazonaws.com/devuxuzejozam/21267471437.pdf
    • http://lixanixuzuki.rf.gd/transformice_shaman_skill_tree_guide.pdf
    • https://s3.amazonaws.com/legipalofi/sale_banner_template_psd_free.pdf
    • https://s3.amazonaws.com/genedonapubefe/1001_arabian_nights_free_download.pdf
    • https://s3.amazonaws.com/kakef/70923147396.pdf
    • http://gamanavaje.epizy.com/wopidade.pdf
    • http://zofumorejo.epizy.com/amikacin_mechanism_of_action.pdf
    • http://fuzakumadobujav.epizy.com/7376854913.pdf
    • https://s3.amazonaws.com/kexamoxusinixu/xogifezededudove.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e11c.bin
59f0c7e414fcbde51fe6372eecde43d2243d8e3ccc986f1a435b7bc58ed0aedd		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE11C 5228 bytes
font_01_sfnt_off0000f2df.bin
7b67b05d22f894bed271a71688cfb5afef34eb0a2fb3ee1a90477d4e94c043ea		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF2DF 10812 bytes
font_02_sfnt_off00011815.bin
547aa25baa6b773f2c2680cb21b8e62307e93fd94c90190b96cdb2b9a6058a75		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11815 16232 bytes
font_03_sfnt_off00012d2e.bin
ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12D2E 4324 bytes

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