PDF malware analysis — malicious · f987684090e56caa

MALICIOUS

PDF

77.4 KB Created: 2021-07-13 03:23:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)

MD5: e373437d7b705f582ae570fc32c521e6 SHA-1: f1ad292123bd54476f17c23dae1e1fb40a025319 SHA-256: f987684090e56caa914d44ec7e2bc358c2fb65a5e1dd99da439eaebaf9f16941

96 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The presence of embedded URLs, despite some being marked as benign, suggests a potential phishing or payload delivery mechanism. The PDF structure and embedded artifacts do not reveal specific scripting languages, but the overall context points towards a malicious document, likely delivered via spearphishing.

Machine Learning

Nyx PDF Classifier malicious score 0.9680

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/sq/ugae/~3/eaN1Eb74jJI/square?utm_term=3+year+old+started+blinking+a+lot
- https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60e8baa94c181567023b9e52/1625864873941/tozaxumadafaxovobizetekuk.pdf
- https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60eca58e0f7d8d50062efd58/1626121614691/celine_dion_if_walls_could_talk_mp3.pdf
- https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60e84202a956a31f0d60c599/1625833986265/46156365242.pdf
- https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60e88e4f0eaa7c19c9d72fa1/1625853519755/xubosopewesejinodaj.pdf
- https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60e959ed3f195e1e4038071d/1625905645402/perfect_liker_download.pdf
- https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60e812ed81471576eaef31f5/1625821934024/mataxuzufuxevawod.pdf
- https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60e7a241dbc52028c83c51cd/1625793089289/61251428949.pdf
- https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60e8e479c4c1a734c5d35bee/1625875577514/pink_stain_on_carpet.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_off0000cf03.bin` `5a77cd22188c389fbba4615555bdcb9e23bd5fe787efd1f61091fbae516fdde0`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xCF03	16084 bytes
`font_01_sfnt_off0000f861.bin` `ce9757816d33fdbc8eabd9faa61490993794a7702ebced62b4fe9e818bd9606e`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF861	10844 bytes
`font_02_sfnt_off0001114f.bin` `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1114F	16792 bytes

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