PDF malware analysis — malicious · 4121395719e0f29a

MALICIOUS

PDF

72.5 KB Created: 2021-05-19 10:52:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: 78c00496ab2ecbd992dff8f600f29acb SHA-1: 7eab9c0c226c6fb92d0da8b66c0abedb6d0442b4 SHA-256: 4121395719e0f29a842827e4cfd3a0fe9440c7d0258ce6383207599e78cdeda3

96 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The file is a PDF document that contains an embedded URL pointing to a malicious domain. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URI heuristic suggest an attempt to redirect the user to a harmful site.

Machine Learning

Nyx PDF Classifier malicious score 0.9998

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://jottigo.ru/strik?utm_term=detailed+lesson+plan+in+pronoun+antecedent+agreement
- http://xesifavaner.22web.org/arm_exercises_with_dumbbells.pdf
- https://static.s123-cdn-static.com/uploads/4416671/normal_5fde3ea8b1520.pdf
- https://static.s123-cdn-static.com/uploads/4465015/normal_5ffe17899cb99.pdf
- http://www.ascendercorp.com/
- http://www.ascendercorp.com/typedesigners.html
- https://uploads.strikinglycdn.com/files/1c40fd65-b70e-47e3-af8b-419bfed1a139/47320349549.pdf
- https://s3.amazonaws.com/zonebon/someone_like_you_van_morrison_song.pdf
- https://s3.amazonaws.com/zemunomipazikez/laxetavew.pdf
- https://s3.amazonaws.com/rizoli/city_of_bones_movie_series.pdf
- https://uploads.strikinglycdn.com/files/93c434c0-e3e2-4c69-b845-45d78f3ab49d/toxezajubuposepuneromoj.pdf
- https://uploads.strikinglycdn.com/files/2273dcba-f7a2-40dd-8f4f-9f3844da80e8/bit_by_bit.pdf
- https://s3.amazonaws.com/xoxaneral/bojunoveliropalorukikekuj.pdf
- http://juxuvirorut.epizy.com/11689520865.pdf
- https://s3.amazonaws.com/fulazelof/lolidijitajobike.pdf
- http://fukatotapi.epizy.com/esia_screening_report.pdf
- https://uploads.strikinglycdn.com/files/4a2415fb-2c6d-4d5c-8d1e-22cdb16c79ba/english_vocabulary_in_use_2nd_elementary_with_answers_and_cd-rom.pdf
- https://s3.amazonaws.com/telasebisu/properties_of_exponents.pdf
- http://wawuzir.epizy.com/benson_ken_worship_audio.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://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000de29.bin` `dc6beb6705f67ca01cd38b8a5944cd6769fa4025fe4397af246dfaa05cb46b88`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xDE29	5392 bytes
`font_01_sfnt_off0000f06d.bin` `152f6c36fffcb64c76e541558124fe98863c718debe579103046be161d54863c`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF06D	10576 bytes

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