PDF malware analysis — malicious · 11d8667dbdadc144

MALICIOUS

PDF

92.8 KB Created: 2021-07-16 00:09:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)

MD5: 76fe5ac87269ebe0aa85daf61be60285 SHA-1: 124d3d8dd468623308486d304ec68d3d17ee197e SHA-256: 11d8667dbdadc144f6ca1eb9812343c88d6175b03e429055ebc32c1d579e8861

96 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. An external URI pointing to 'nomylo.ru' was extracted, which is likely the phishing destination. While no scripts were directly extracted, the PDF structure and the presence of a suspicious URL suggest a phishing attempt, possibly leveraging embedded JavaScript for redirection.

Machine Learning

Nyx PDF Classifier malicious score 0.7341

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://nomylo.ru/square?utm_term=i+wish+i+could+meaning+in+tamil
- https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60f002e7c0b35f4fb3db01d2/1626342119520/tusiketumiwomubaz.pdf
- https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60e94d3d8ce0e10532d3f60b/1625902397209/xugigam.pdf
- https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60ee0f74df274736e0a80264/1626214260368/73131608481.pdf
- https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60e91348f107ff2467e87a27/1625887560493/introduction_to_sociology_short_answer_questions.pdf
- https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60e915c20a287971af998c0f/1625888194240/how_to_put_text_boxes_on_a.pdf
- https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60ec82bae64ce5371634b970/1626112698425/12717472404.pdf
- https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60f046c55d627c4551e69cfb/1626359493576/should_you_text_a_guy_that_ghosted_you.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 4

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000efb8.bin` `cdd70fad1960937ebc25f964ad96d9fa9d634fe767438879fc422a23a072c253`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xEFB8	16548 bytes
`font_01_sfnt_off000106d8.bin` `110d793d023085a7d791da0f825c4e9c704fac70528150faea904ba8a74fd561`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x106D8	17840 bytes
`font_02_sfnt_off00013617.bin` `c2677658389c4d15093e5b99dbe314a01bfa4ac6e2f7058b8fbb6fc0c276423c`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x13617	10856 bytes
`font_03_sfnt_off00014ed5.bin` `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x14ED5	16792 bytes

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