Malicious PDF — malware analysis report

Static analysis result for SHA-256 0c52f6cf22515be2…

MALICIOUS

PDF

78.0 KB Created: 2021-03-14 06:41:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 00e849bf15c34de23cb361f23aacaf84 SHA-1: 75c0e85a6f166bd19537dc5576ae5bdf3b69e91f SHA-256: 0c52f6cf22515be2193e7a65c2df6d17052b357c8dca3cc11635c4c50a22942d
96 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, indicating a high likelihood of malicious intent. It contains an embedded URI pointing to a suspicious domain, likely intended to redirect the user to a phishing or malware distribution site. The document body is heavily obfuscated, but the presence of the external URI is the primary indicator of malicious activity.

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://gimoguvi.ru/wix?keyword=devil+sticks+fire
    • http://dkmz2.club/how_to_write_a_visual_argument_essay6q4cs.pdf
    • https://fimedezederuru.weebly.com/uploads/1/3/4/8/134884956/tafexawonapok.pdf
    • http://llloooodddd.space/surah_yaseen_full_englishylgx6.pdf
    • https://volexerakonoza.weebly.com/uploads/1/3/4/7/134713377/fevugivanakufakobu.pdf
    • https://wikifepum.weebly.com/uploads/1/3/3/9/133986434/ff80d46a5df2144.pdf
    • https://koxepaje.weebly.com/uploads/1/3/5/3/135350813/3434833.pdf
    • http://sandiego-podcasts.com/sepazazasumejogodolkl2h1.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • http://badamowafe.onlinewebshop.net/akademia_pana_kleksa_ksika.pdf
    • https://uploads.strikinglycdn.com/files/3e4ff3c7-a230-442c-89c5-03120feac4b3/star_trek_the_next_generation_season_1_episode_5_watch_online.pdf
    • https://uploads.strikinglycdn.com/files/ba695bdf-0957-4d60-9a3a-d8f2e343ce20/how_hard_is_linux_essentials.pdf
    • https://s3.amazonaws.com/wurivuve/38458482830.pdf
    • https://59cf682b-6680-4a08-8b8d-0472bab64ef7.filesusr.com/ugd/d7d6cd_40ce33e3af644e138d54193131f88f0c.pdf?index=true
    • https://uploads.strikinglycdn.com/files/53552309-62cd-4131-9457-0a7277246059/55464016833.pdf
    • https://uploads.strikinglycdn.com/files/face0ee3-1bb0-46ff-847b-65f5132cafac/6865811851.pdf
    • https://s3.amazonaws.com/pobixedele/xedezabozofebogivu.pdf
    • https://627f215e-41ba-4aa4-9906-5f9f9d117739.filesusr.com/ugd/8ab72e_a256c2eaeed84201b0a11fb58bdc5e20.pdf?index=true
    • http://gozuketitara.onlinewebshop.net/behaviorist_manifesto.pdf
    • https://uploads.strikinglycdn.com/files/b21c151a-0f6f-4ae0-abb5-ce6b305c0c15/49206799388.pdf
    • http://tebaputazaxuva.myartsonline.com/26299312404.pdf
    • https://s3.amazonaws.com/wovitiku/matrimonial_biodata_template_microsoft_word_free.pdf
    • https://c9b0c9dc-51ad-46ec-84b2-dbc26df53712.filesusr.com/ugd/b6f588_56c6b6c1fa6d40cfbf4ccdd862577a87.pdf?index=true
    • https://104e0e48-a4c2-4a03-8647-06ef64d4e6ac.filesusr.com/ugd/e2c6c1_0b0c465461ec46ec83f4e506c6819839.pdf?index=true
    • 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_off0000ea38.bin
3a2bf55ccb0a21fcc2a55da17858321e04241c8a4fed39d41edb6a6e52ed85f2		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEA38 4360 bytes
font_01_sfnt_off0000f91a.bin
070e6c18058bfa471fde779ab72a7bb4503e48db22cb2eba7d35369d50e5b38c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF91A 10360 bytes
font_02_sfnt_off00011c9b.bin
ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11C9B 4324 bytes

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