PDF malware analysis — malicious · 8c6f6f2955fbfaf0

MALICIOUS

PDF

79.7 KB Created: 2021-07-20 01:50:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)

MD5: b11845680b308884b7ec9e956cec1a71 SHA-1: b2485188868c9e6a2b58d641a3ae26d898a3c908 SHA-256: 8c6f6f2955fbfaf0aa40bac806bc92d814b4ae55ffb332ad26fe45e87929ac91

96 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The file was identified as malicious by ML classification and ClamAV, indicating a high likelihood of malicious intent. The presence of embedded URLs, despite some being labeled benign, suggests an attempt to redirect the user to potentially harmful content. The PDF structure and embedded artifacts do not reveal specific scripting languages, but the overall context points towards a phishing or malware distribution vector.

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/ZV5PD9BTPXI/square?utm_term=the+complete+sookie+stackhouse+stories+pdf
- https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60f0c89e9627e70a9ac90a55/1626392734271/30709923196.pdf
- https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60ec84a3a1f8f93f64abdd46/1626113187732/lin_chi_chinese.pdf
- https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60e89811418e2b612de5a2f9/1625856017392/historically_accurate_toga.pdf
- https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60f0344be9d3bc6103000199/1626354763799/const_and_let_javascript.pdf
- https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60ee2614b27e5958d58d83b7/1626220052173/photosynthesis_review_worksheet_answer_key.pdf
- https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60ec786c3f7a034ccb79495e/1626110060725/how_to_decrease_the_size_of_the_file.pdf
- https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60f0b8fed1fa142bcea9c7e7/1626388734620/heal_abrasion_fast.pdf
- https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60ee6d57e9cbfe6c2feaeb80/1626238295265/34273710310.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_off0000d56b.bin` `98ebedc8e7bdff1189161486b9638609845444d01e8e1d5dbebdff50eee49b9a`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xD56B	16844 bytes
`font_01_sfnt_off00010129.bin` `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10129	16792 bytes
`font_02_sfnt_off00011940.bin` `6c71817e7a8c740ba38035b0c0516c4aa9b97de1945a4b9d9bb83c9485c522e6`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x11940	10936 bytes

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