PDF malware analysis — malicious · 357a0dd381b804d2

MALICIOUS

PDF

78.4 KB Created: 2021-03-20 12:13:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: a6d945d60161182268e56cbf2739eead SHA-1: 7a9c2237fa068c1feca19ff8c77922a5a0461ea6 SHA-256: 357a0dd381b804d2c3c55b534051df2c8bf66490ad6af400ac734c7415b3e6a7

96 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URI pointing to a URL related to interview preparation, suggesting a social engineering lure. While no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of a phishing attempt designed to redirect users to malicious content.

Machine Learning

Nyx PDF Classifier malicious score 0.9997

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://zajinet.ru/strik?utm_term=how+to+prepare+for+a+good+interview
- https://takijotirodone.weebly.com/uploads/1/3/1/6/131637658/4174680.pdf
- https://cdn-cms.f-static.net/uploads/4383695/normal_5fd7ea608cc21.pdf
- https://static.s123-cdn-static.com/uploads/4403404/normal_5fdf939659fa2.pdf
- https://static.s123-cdn-static.com/uploads/4487641/normal_5ff8d3bf0a9df.pdf
- http://zuzimosutikume.22web.org/giridaxiwonifisefavibu.pdf
- https://cdn.sqhk.co/selugijibix/gBQYMEv/66697832765.pdf
- https://cdn.sqhk.co/wemopizajazo/BhcLKZT/71004281632.pdf
- https://cdn.sqhk.co/lupokuna/ggJGscO/mod_pizza_near_medical_center.pdf
- https://xetutimi.weebly.com/uploads/1/3/0/9/130968997/28b64cad.pdf
- http://www.ascendercorp.com/
- http://www.ascendercorp.com/typedesigners.html
- http://leragirifodoz.rf.gd/ielts_speaking_task_2_questions_with_answers.pdf
- http://likamufibunefar.epizy.com/ragal.pdf
- http://wesafisuki.epizy.com/kilivowipuzixezamuv.pdf
- http://ravowimeju.epizy.com/cipe_pineles_a_life_of_design.pdf
- https://e85625e8-91d5-48c2-95a4-67b7b95d5b39.filesusr.com/ugd/b97a97_2a86ebf922c542dba03bfbbb345eab2b.pdf?index=true
- https://5a8aee2d-3d68-4c09-98ed-743c9c56d6fd.filesusr.com/ugd/460efe_8769b52c9a7547c3b6a58236023a0aaf.pdf?index=true
- http://vezapuro.rf.gd/cute_baby_images_free.pdf
- http://befojarariwowab.epizy.com/latest_bollywood_song_full_hd_video.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_off0000f5d5.bin` `548037f0abc56fac9e1d578e5de46d23a8f69fadf3ba381d79a7c61882d7bbb6`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF5D5	5112 bytes
`font_01_sfnt_off00010767.bin` `d6e5bdeae0fd2d595054395a8d6600e5ed37fe7c164f1f5092f5944e3c02dee6`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10767	10796 bytes

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