Malicious PDF — malware analysis report

Static analysis result for SHA-256 7713323c4ba88ea3…

MALICIOUS

PDF

80.1 KB Created: 2021-03-23 05:21:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 49c322e5b96fc67d774d807c38a5f8c0 SHA-1: dccdc2a989a30a1b06ca9e9d07bcb5686f1a9cf6 SHA-256: 7713323c4ba88ea3af2ceafa294ee0416afebe37f8de15f4a668a0922b968fc6
96 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains an embedded URI pointing to a suspicious domain, likely intended to host a phishing page or download further malware. The document body, though heavily obfuscated, contains metadata suggesting it was generated by wkhtmltopdf, a tool often used to create malicious PDFs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://seumenha.ru/wix?keyword=harold+and+kumar+3d+christmas+watch+online
    • http://prizinsta.online/10287232978s3kcb.pdf
    • http://fifamarketbot.com/83458283038b90lm.pdf
    • http://zdorovienashevse.xyz/windows_movie_maker_2012_windows_10s364l.pdf
    • http://dawuxapi.iblogger.org/75372598662.pdf
    • http://natotakujoriw.iblogger.org/72304815913.pdf
    • http://fasufigige.iblogger.org/bostitch_stapler_b8e_manual.pdf
    • http://polnews.xyz/boruto_vs_kawaki_full_fightf2vpi.pdf
    • http://differencecheats.net/zakurede9c67w.pdf
    • http://chebsvet.ru/how_to_connect_brother_mfc_l5850dw_to_computerweh26.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://uploads.strikinglycdn.com/files/5d1219ec-61ab-4ad2-853b-515fba2a3c76/what_are_strengths_and_weaknesses_of_the_articles_of_confederation.pdf
    • https://a8a70d16-e3f0-4805-b115-4d8c62c40b57.filesusr.com/ugd/82e28d_14deac193b0b4f67b5ae03df41a5ee71.pdf?index=true
    • https://45f91bdd-2b68-4e60-ae2c-b14373ae5332.filesusr.com/ugd/0d089b_4387ebfea9eb44378f628e7bf19161d4.pdf?index=true
    • https://b4140449-9b96-4148-8619-c9b3eed7b48c.filesusr.com/ugd/c33cdb_1dc413850b9e40ddac860206bc2f3340.pdf?index=true
    • http://fezivadijar.rf.gd/7307471729.pdf
    • https://9a60fab3-6fb0-4be7-9305-b2e3cc44d963.filesusr.com/ugd/811c4f_b14618637dfb4d41a0a3462b4da6130a.pdf?index=true
    • https://uploads.strikinglycdn.com/files/283c467c-31d8-4667-921d-cc054bd330e7/nordictrack_audiostrider_990_spacesaver.pdf
    • https://1b53f64c-3596-40ff-86ea-95cec8902569.filesusr.com/ugd/838e7e_af86aa50817244548f4b2947b51f9bef.pdf?index=true
    • https://51956041-da35-40aa-96c1-085c1f47c80d.filesusr.com/ugd/e6e573_db26d00c3be84e048a56875f477b74d4.pdf?index=true
    • http://lidagigum.rf.gd/14191797902.pdf
    • https://uploads.strikinglycdn.com/files/100006d9-5f23-461f-a014-158242992e10/36380774457.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_off0000ef46.bin
2b699b69afd8b47bba2e1ba614c2cd635aa41878f3209de39e80ec6e8156eac2		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEF46 5344 bytes
font_01_sfnt_off00010147.bin
2d6c80bf4955d9e972f84b4ca2f570b9f35ebc00b3f4112bcb65d4dc569a2934		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10147 10320 bytes
font_02_sfnt_off000124a7.bin
a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x124A7 4324 bytes

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