Malicious PDF — malware analysis report

Static analysis result for SHA-256 f64335c109309bd5…

MALICIOUS

PDF

98.0 KB Created: 2021-03-29 07:51:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1bfcbce20574edfc1726e0aeac199754 SHA-1: 7bbaa6d46320db25fb6fa0dabeed92e715a69af6 SHA-256: f64335c109309bd5ed47ced21a98ada9d2ae572bd3f8ee03d82c71f3d7cc98b6
96 Risk Score

Malware Insights

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

The file is identified as malicious by ML classifiers and ClamAV, with a high risk score. It contains an embedded URL pointing to a suspicious domain, which is a common tactic for phishing or distributing further malware. The PDF structure itself shows signs of manipulation, with duplicate object bodies, and the presence of external URIs further supports a malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://xezojetit.ru/wix?keyword=sel+roti+nepal
    • http://wosurijegu.22web.org/bokosi.pdf
    • http://winokuzovew.iblogger.org/knowledge_matters_budgeting_and_saving_answers.pdf
    • http://nulonelam.66ghz.com/79247745014.pdf
    • https://cdn.sqhk.co/pevedapev/mhgihij/at_t_u-_verse_customer_service_line.pdf
    • https://wabobileminila.weebly.com/uploads/1/3/5/4/135400898/73efc.pdf
    • https://cdn.sqhk.co/pepupiribojo/jiDsUJT/guide_des_maladies_infectieuses_et_parasitaires.pdf
    • https://xuxasogunoniku.weebly.com/uploads/1/3/1/8/131856570/pukokeweb.pdf
    • https://cdn.sqhk.co/xamewivuvus/ibGgdgg/7535557199.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • http://fedorahosted.org/lohit
    • https://abaaaae4-9231-44fc-b12c-ad55ebcc68e7.filesusr.com/ugd/2ca09c_36c00f7d31f843fdb605ba6b5bcbd0ab.pdf?index=true
    • https://uploads.strikinglycdn.com/files/921e8f3b-809b-45dc-8b1f-d9e325044ab0/chess_learning_app_android.pdf
    • http://kesibesezusede.rf.gd/83058588565.pdf
    • https://uploads.strikinglycdn.com/files/dbd086b2-ed39-42c8-a3e6-74113dc24c95/zojewabotulivetowebutawi.pdf
    • http://vomigok.rf.gd/6368817490.pdf
    • https://45e41439-46a4-4c97-84f0-155cfeda4cef.filesusr.com/ugd/9d7ad9_0bb095bcdcf04507b074304b2635365e.pdf?index=true
    • http://gimemos.epizy.com/44183158570.pdf
    • http://tufozule.rf.gd/18615066860.pdf
    • http://fezanigevuxuso.rf.gd/betepejapowoxafo.pdf
    • https://uploads.strikinglycdn.com/files/c20472c1-212c-46d0-b5a3-4feb073da23c/23442284851.pdf
    • https://2b81f3f0-3f46-42ff-87a7-5865dd96cd3c.filesusr.com/ugd/fb41f9_1f020f2cffcf41cb9b7c0db36a134922.pdf?index=true
    • https://uploads.strikinglycdn.com/files/edb77111-6ec2-449b-bc22-bfe3fd4714b3/63429828866.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00012b2a.bin
c2e0a53a2b8fba1235e14225416cd473f6b3e36a9dda9b47f6edfcfdf67a595f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12B2A 4528 bytes
font_01_sfnt_off00013a81.bin
409d6703f9d446915ea024e5a28a4f74a6c843f10955e478495a7f44adee8bb6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13A81 11220 bytes
font_02_sfnt_off000160c5.bin
4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x160C5 4324 bytes
font_03_sfnt_off00016ec4.bin
4cb4aea79a30dc4ed06f75bacf510fe79c53093754350d2ffe8b029c2b6f8135		 pdf-font-stream PDF embedded font (sfnt) at offset 0x16EC4 2908 bytes

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