PDF malware analysis — malicious · 3b1410585f7bf262

MALICIOUS

PDF

78.1 KB Created: 2021-07-21 08:40:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)

MD5: c7594d5e3be50ae0d68a645852e46116 SHA-1: 3f3881771018b9238bcc9d34d471e5b07aa10947 SHA-256: 3b1410585f7bf262fa37e4d6a091b0c87aa3a721e94d07f093d65fbdc9529e32

96 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

This PDF file was flagged by a machine learning classifier and ClamAV as malicious. It contains embedded URLs, one of which is a feedproxy URL that resolves to a PDF document. The document body is heavily obfuscated, preventing a clear understanding of its specific lure. However, the presence of external URLs and the high confidence detection suggest it is designed to lead the user to a malicious resource or download a secondary payload.

Machine Learning

Nyx PDF Classifier malicious score 0.9478

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://feedproxy.google.com/~r/sq/ugae/~3/gOBB6uaVNRA/square?utm_term=labor+and+delivery+nurse+salary
- https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60e94b16566ded7d61adee73/1625901847109/nedusazuravepamel.pdf
- https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60f073700fcd175c5035ef60/1626370929046/epic_seven_gameplay.pdf
- https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60ec9d73e0784948549ad644/1626119539203/calculate_angle_between_two_vectors_online.pdf
- https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60e915048fb24157da6fa099/1625888004217/1696989112.pdf
- https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60ee87d39c71001bedf9d714/1626245075568/22_mile_to_km.pdf
- https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60e8ee35dc37083541b6609e/1625878069687/one_minute_manager_free.pdf
- https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60e93f1b309bd63f3d86ffe5/1625898779255/baltimore_radio_stations_online.pdf
- https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60f117e5d1d8e65aae861498/1626413029288/93953503472.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_off0000d3e1.bin` `644f95c58eee8748d2f07461087b8e0c62e3c4248f7a48ad181e39ed8ad3057e`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xD3E1	15804 bytes
`font_01_sfnt_off0000fc13.bin` `e76f83928e77c0ec085490714f208dc968b0324772da666674f2db2933ab329e`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xFC13	10520 bytes
`font_02_sfnt_off0001141e.bin` `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1141E	16792 bytes

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