Malicious PDF — malware analysis report

Static analysis result for SHA-256 e5d7379334919886…

MALICIOUS

PDF

71.8 KB Created: 2021-04-18 04:30:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 51cec877014be32619f838c4748e582b SHA-1: 512e4c1bb6477261dc2d4d7c9b4e035a4ecde215 SHA-256: e5d7379334919886d25f248f38a9054b6f21a854f02d060c6addba166b603b06
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution T1059.007 JavaScript

The PDF contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic, suggesting a link farm or phishing attempt. The ClamAV detection and ML classifier further indicate malicious intent. While no scripts were directly extracted, the presence of external links and the nature of the heuristics point towards a malicious document, likely a phishing lure or SEO spam.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9988

Heuristics 5

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://dafemum.ru/strik?utm_term=nixon+watches+sale+canada
    • https://nariwezug.weebly.com/uploads/1/3/1/4/131482968/1637282.pdf
    • https://tamusibexo.weebly.com/uploads/1/3/5/9/135966636/jikidus.pdf
    • http://dobazaviwamip.iblogger.org/decimal_to_bcd_encoder.pdf
    • https://gesuveta.weebly.com/uploads/1/3/2/6/132680901/dejukum-vofito.pdf
    • https://wufaxewixebel.weebly.com/uploads/1/3/5/3/135302410/c830e5669.pdf
    • http://dukofinezamidol.22web.org/honda_generator_eu3000is_wheel_kit.pdf
    • https://bebedukiraf.weebly.com/uploads/1/3/4/8/134885496/6b2e71f3078e1.pdf
    • https://davufafelasipip.weebly.com/uploads/1/3/4/3/134328138/limizulozitarikez.pdf
    • https://lepitosamodovax.weebly.com/uploads/1/3/4/3/134335454/sereko.pdf
    • https://ginataxidorivez.weebly.com/uploads/1/3/4/0/134041929/9970375.pdf
    • https://vemosesagegedow.weebly.com/uploads/1/3/4/3/134312783/piretapi.pdf
    • http://fontawesome.iohttp://fontawesome.io/license/
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/101e9992-52c6-4777-ab7c-48cd98fcb377/tuxaxawolotoxeguwuguseda.pdf
    • http://riwofepijisanet.epizy.com/duzibiwikafinesax.pdf
    • https://uploads.strikinglycdn.com/files/dda2ca3c-edb0-4e31-bfae-75d8c2e0c3d9/how_does_erosion_impact_the_earth.pdf
    • https://uploads.strikinglycdn.com/files/2c90b24b-f16f-49ee-bdf2-9182ead3dcf8/how_to_program_liftmaster_keypad_877max.pdf
    • https://0df6220b-9630-4647-aab6-0d9db69b9d59.filesusr.com/ugd/8b97dd_e52b13d121be4caea9087227b799a31a.pdf?index=true
    • https://uploads.strikinglycdn.com/files/01d2072f-36b4-4084-b447-fc64df1e5691/44837976737.pdf
    • https://uploads.strikinglycdn.com/files/c60cacb4-6796-4500-9a61-be885d6f5073/vanobes.pdf
    • https://dda5c79a-a75d-44d9-a006-48dec3bfe172.filesusr.com/ugd/115d6e_20d45c6374564ba290de13bfad99301a.pdf?index=true
    • https://uploads.strikinglycdn.com/files/f358e7d1-b511-43af-b00d-a4e3f358ad75/the_twilight_saga_new_moon_soundtrack_download_hindi_dubbed.pdf
    • http://piwufamudadavo.rf.gd/4632676024.pdf
    • https://0b21792c-a699-4cf4-8833-5910c6ad58af.filesusr.com/ugd/b0b521_695e9d9128de442bae57b27aa7813831.pdf?index=true
    • http://zosusakadutadi.epizy.com/mazij.pdf
    • https://uploads.strikinglycdn.com/files/bdc32c46-0538-41f8-8793-937e082d4211/is_programmed_decision.pdf
    • https://uploads.strikinglycdn.com/files/5d3c25ea-a60e-425b-bbc3-c397af7fda2d/35943165305.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_off0000d3db.bin
3f970c45e1aacf9fc5a3f7f8715ea8552ab866e181089cb3f9e66f48da3a7345		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD3DB 1584 bytes
font_01_sfnt_off0000dbe4.bin
d98c32497ba698abebbb921d3de057a72a4167bccb914d423d9cbc68281a05f5		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDBE4 5060 bytes
font_02_sfnt_off0000ed2f.bin
f20c90a2f38298ef0ce54fe724c6d1d269bfe7e2552eb62080eda95cbf4e90b1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xED2F 10276 bytes

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