PDF malware analysis — malicious · 658ea6443e91fdc9

MALICIOUS

PDF

81.5 KB Created: 2021-07-21 08:23:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)

MD5: b1a5e837dfc7d44bd6d53b22f863ff3b SHA-1: 66bbf1b9cba47ae4205b317b5ce1fc14b008f344 SHA-256: 658ea6443e91fdc94a361698eb197b3ec2dfddd7d5a68afdf9a6196d69545286

96 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF contains an embedded URL that leads to a suspicious domain, identified by heuristics as a phishing attempt. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URI suggest it's designed to redirect users to a malicious site, likely for credential harvesting or further malware delivery.

Machine Learning

Nyx PDF Classifier malicious score 0.9906

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://catamma.ru/square?utm_term=mathematical+reasoning+questions+for+jee+mains+pdf
- https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60ec8a81f89f8e700bf82886/1626114689396/samewilalefasewexitotaxi.pdf
- https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60f033641c2a31383790ebb2/1626354533089/zunuxixajejufo.pdf
- https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60ee5ab37dee9f188f7a67e7/1626233523998/97256003938.pdf
- https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60efeb9b79f953043cbd970d/1626336155978/64159692206.pdf
- https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60e9001d5fa2eb14b90a584d/1625882654127/78946712124.pdf
- https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60f07c49d941835b131abcac/1626373194100/iphone_6s_owners_manual.pdf
- https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60e9474edc37083541b9f419/1625900878216/19462010425.pdf
- https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60f0afbc9ac96d695a4b250e/1626386365187/is_there_any_update.pdf
- https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60edcfaed9d5ad70ebd0cbac/1626197934898/fexopome.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://dejavu.sourceforge.net
- http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000d7b9.bin` `cf624c1a118bdc78a6cff95d43682a96c7edc867379d640d5b6005507241e070`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xD7B9	11436 bytes
`font_01_sfnt_off0000f1fb.bin` `8558541da6ecd55180e7324f1afde1453f577cac9e8dfdc25a52d9509ab27818`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF1FB	17928 bytes
`font_02_sfnt_off0001214e.bin` `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1214E	16792 bytes

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