PDF malware analysis — malicious · 806d0899a20cf79c

MALICIOUS

PDF

76.1 KB Created: 2021-07-16 20:19:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)

MD5: 898cdc2277a1550b09e5ce40fd0f5112 SHA-1: 72442c8c9a5361ed5d81df311f2b6c0291f4c347 SHA-256: 806d0899a20cf79c904ae89370b8fd0944204be80a1f784464453e85be026aae

96 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The file was detected as malicious by a machine learning classifier and ClamAV, indicating a high likelihood of malicious intent. The presence of embedded URLs, despite some being marked as benign, suggests an attempt to redirect the user to potentially harmful content. The document body is heavily obfuscated, preventing a clear understanding of its specific lure, but the overall structure and heuristic firings point towards a phishing or credential harvesting attempt.

Machine Learning

Nyx PDF Classifier malicious score 0.9163

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/razvivatel/yapz/~3/kVSxLQpkboc/square?utm_term=how+to+scan+a+large+document+to+pdf
- https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60eda7f7c7772f26c851f9cb/1626187767459/43216989688.pdf
- https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60eceb37f8b4e244e4f7e16c/1626139448209/funny_quotes_by_famous_people.pdf
- https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60e923bac91b61347ea3cf4f/1625891770538/34106291849.pdf
- https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60ee2b09ab0cb8743be33ab8/1626221321541/hear_my_prayer_o_lord_from_the_ends_of_the_earth_i_cry.pdf
- https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60e9355c12fb7d0b2794150b/1625896284312/quick_and_easy_lasagna.pdf
- https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60ec808cdd2ac847ff7e5929/1626112140487/timing_cover_gasket_leak_cost.pdf
- https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60e8d4fa781e3e37a185c26a/1625871611139/how_to_know_if_inpods_12s_is_fully_charged.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_off0000c8ee.bin` `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xC8EE	16792 bytes
`font_01_sfnt_off0000e105.bin` `cb326d2144a97a5ed9de6660385e9c18c02300ad436bf6f6cbe03cf40de7f5be`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE105	11048 bytes
`font_02_sfnt_off0000fa9b.bin` `c60bf84d1beb31f1aafefa5d4950e6e755d25e91bb5e4e05d2e83997a2585223`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xFA9B	16196 bytes

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