PDF malware analysis — malicious · 1b4b2d13b5ef4850

MALICIOUS

PDF

82.4 KB Created: 2021-07-14 00:41:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)

MD5: e98a5aeea319d87e9e74bfc4dbc763c8 SHA-1: 7e0603de53af10e79f5ff80f7444164b40b63cf3 SHA-256: 1b4b2d13b5ef48501585f5b8335e08de6abec56fd350b1d3226d6f8da8ecc26b

96 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF_URI heuristic indicates the presence of an external URI, suggesting a phishing or redirection attempt. The ML classifier and ClamAV detection strongly support a malicious classification. While no scripts were extracted, the embedded URI is the primary indicator of a malicious intent to redirect the user to a potentially harmful site.

Machine Learning

Nyx PDF Classifier malicious score 0.9898

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/v-xubMviL4Y/square?utm_term=getting+married+stardew+valley
- https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60ec86bffa40056e74d29a82/1626113727850/dewatering_systems_in_construction.pdf
- https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60e7cf2985664d35b0e6ebaf/1625804585491/simplest_form_of_fraction.pdf
- https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60ed0daf3489b768f16c6fa3/1626148271769/how_to_write_a_chemical_equation_class_10.pdf
- https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60ec93af478ebe26bfc6dc5b/1626117039918/hach_as950_manual.pdf
- https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60ee027b9942ff19c76b3005/1626210939425/xotedevozajijerudog.pdf
- https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60e77e433912f07333d826c1/1625783875919/53863248498.pdf
- https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60ed61b96be96a4ec409a48b/1626169785809/55496235313.pdf
- https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60edc7c57979814f85a5c7c1/1626195910041/cydia_download_without_pc.pdf
- https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60ec7ad0c217102653d53666/1626110672793/noliseworo.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_off0000de8a.bin` `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xDE8A	16792 bytes
`font_01_sfnt_off0000f69c.bin` `169ae098b68c0dc883af1e7ab2fe72f266669d5e3ccb7c7c282dea2a0c2a2b09`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF69C	17068 bytes
`font_02_sfnt_off00012373.bin` `53714348f3b7e81079074b9bdd74e5591f2a330e279947a35492f5cfcc01a9b7`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x12373	10776 bytes

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