PDF malware analysis — malicious · aa16cfdaa8685e56

MALICIOUS

PDF

79.2 KB Created: 2021-07-17 10:16:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)

MD5: f4ea9976cd3900bbbbcfc1d5f3a0eeb3 SHA-1: 32805919721d0c680dd94f0ebfe89e95828a5eb0 SHA-256: aa16cfdaa8685e56d18636d8ec5235aed62b92b8958d1926564439cf58532612

96 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. The PDF contains embedded URLs that likely lead to malicious content or further stages of an attack. Although no scripts were explicitly extracted, the PDF structure and embedded URIs suggest an attempt to exploit vulnerabilities or trick the user into navigating to a harmful site.

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://feedproxy.google.com/~r/razvivatel/yapz/~3/IdU8rIDf9lQ/square?utm_term=how+many+types+of+cell+division+are+there
- https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60e8f4662dabf272355242c2/1625879654380/vasuxir.pdf
- https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60f0f082a57b467a228de1e1/1626402946314/tosuxonuwanevekikawab.pdf
- https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60f21ed77e0b4d5f6b0e5636/1626480343658/hide_in_english.pdf
- https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60e8ee48defa333328a82347/1625878088461/beef_with_oyster_sauce_and_mushroom.pdf
- https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60f1fc112516006cc691c786/1626471441826/97434857982.pdf
- https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60ec81c0947cc46ca1285ebb/1626112449046/59607183240.pdf
- https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60e7cf314261ba7980609f0f/1625804593884/vosili.pdf
- https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60e92cd6fc46b150582878c0/1625894102947/2_months_baby_in_womb.pdf
- https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60e91734dc37083541b8638c/1625888564343/71143166909.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_off0000d4fe.bin` `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xD4FE	16792 bytes
`font_01_sfnt_off0000ed10.bin` `bbb56f07d02deb2e5e116b5835486a255cbe37aab4f22a87dc733d0b278680c8`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xED10	16028 bytes
`font_02_sfnt_off00011692.bin` `56389aba3876a027052a8bcd41fd346bed444081e24814413ae129640da415c7`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x11692	11140 bytes

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