PDF malware analysis — malicious · ff721e1baa42f442

MALICIOUS

PDF

82.3 KB Created: 2021-07-15 08:59:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)

MD5: 8ec3d292218deeef7ff21cbe79dd4640 SHA-1: 0649b6fbf5d688f7966483b7d7aa76847e44e35b SHA-256: ff721e1baa42f442379815989185151202923e1354da4439cfe27aaf54cc6229

96 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF file was flagged by ClamAV as a phishing trojan and a machine learning classifier indicated a high probability of maliciousness. The embedded URL, though marked as benign, points to content related to hacking 'brawl stars to get gems', a common lure for phishing or malware distribution. The PDF structure also shows duplicate object bodies, which can be used to obfuscate malicious content.

Machine Learning

Nyx PDF Classifier malicious score 0.9438

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://feedproxy.google.com/~r/sq/ugae/~3/5VO7y1TeAqQ/square?utm_term=how+to+hack+brawl+stars+to+get+gems
- https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60ed98aef90efc25ed73ff6e/1626183854848/tuwijuk.pdf
- https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60ed8b9b66c2900cf56242ee/1626180507132/robuvapovitumezijela.pdf
- https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60ee53e0e7148d06bc72693e/1626231776170/answers_to_beatles_picture_quiz.pdf
- https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60ec8541f89f8e700bf7960b/1626113345798/vaderipetizili.pdf
- https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60efcd313db90d3c356de7a9/1626328369731/thomas_wooden_railway_charlie.pdf
- https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60e8b3f3ec1fec18b7a4311b/1625863155565/package_not_due_for_delivery.pdf
- https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60efca1596309e3685a88f29/1626327573791/girl_with_short_black_hair.pdf
- https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60e9399c37da2614570efec0/1625897372459/committee_of_permanent_representatives.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_off0000e0eb.bin` `726a11ea8774b0a58682d7394d895c8c8e26983cbcd3af9945b09142f08099a0`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE0EB	10788 bytes
`font_01_sfnt_off0000f9e6.bin` `ba2e7786e1022beacc55042559a7a2fa018f71ddaa611c601328cf7b18004fc2`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF9E6	16740 bytes
`font_02_sfnt_off0001238f.bin` `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1238F	16792 bytes

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