PDF malware analysis — malicious · af32a1852e6e1a04

MALICIOUS

PDF

81.2 KB Created: 2021-06-14 08:56:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14

MD5: d80ae72837805556d918dc492fa575e6 SHA-1: 117d88399caa0f20c2985305b7c307811304120f SHA-256: af32a1852e6e1a044dec7acd62be253d0e8f2e94872ebec98156e3d1a3c1bbce

126 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, with one prominent URL pointing to 'wastran.ru', suggesting a phishing or malware distribution attempt. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates the PDF is designed as a link farm on disposable hosting, further supporting the malicious intent.

Machine Learning

Nyx PDF Classifier malicious score 0.9995

Heuristics 5

ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM

Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
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://wastran.ru/pbw?utm_term=surah+dukhan+full+read+online PDF link annotation
- http://www.ascendercorp.com/In PDF document text
- http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
- http://duwaxifu.pbworks.com/f/75754337266.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/4fcdafa9-13ce-4c42-b11e-1e3f95ca3127/47281545130.pdfIn PDF document text
- http://lekadebixe.pbworks.com/f/81372465961.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/f32ffe25-28a3-43ec-bb39-9e96ff33fb7d/what_does_im_mean_in_hebrew.pdfIn PDF document text
- http://jabevexizoj.pbworks.com/w/file/fetch/144866265/130_mbdownload_wwe_2k14_highly_compressed_file_for_android_in_ppsspp.pdfIn PDF document text
- http://metukamef.pbworks.com/f/xerogunitinawagegaba.pdfIn PDF document text
- http://vuxagekume.pbworks.com/f/how_to_spawn_in_a_reaper_queen.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/35ee3e2d-e81e-4d5f-837c-af1f7e139cbc/dofobirev.pdfIn PDF document text
- http://fibonilavi.pbworks.com/f/verb_dire_in_french.pdfIn PDF document text
- http://xuwajesorewo.pbworks.com/f/83739051605.pdfIn PDF document text
- http://giwupiraride.pbworks.com/f/zobitenodita.pdfIn PDF document text
- http://xovakovawup.pbworks.com/f/class_7_history_chapter_8.pdfIn PDF document text
- http://gepefupugalu.pbworks.com/f/nclex_rn_4000_free_online.pdfIn PDF document text
- http://zuwofig.pbworks.com/w/file/fetch/144534924/reading_comprehension_passages_grade_12.pdfIn PDF document text
- http://lakebimutep.pbworks.com/w/file/fetch/145274985/hotstar_app_premium_apk.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/45f6af15-c375-42b3-a65c-f764ef3031c8/poxajot.pdfIn PDF document text
- http://ridelox.pbworks.com/f/cool_emoji_faces_copy_and_paste.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/615c0b7e-b9ad-464e-832f-6655426d61a9/joe_turners_come_and_gone_summary_act_1.pdfIn PDF document text
- http://risoxef.pbworks.com/f/edipo_rey_y_antigona_libro_completo.pdfIn PDF document text
- http://zikekexobo.pbworks.com/f/50493018268.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/8c42dceb-77ae-4251-bfab-290e815877ff/dewefurulu.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/ca7e098b-1c56-4399-a20d-d846f680682b/how_to_learn_korean_beginners.pdfIn PDF document text
- http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
- http://purl.org/dc/elements/1.1/In PDF document text
- http://ns.adobe.com/pdf/1.3/In PDF document text
- http://ns.adobe.com/xap/1.0/In PDF document text
- http://ns.adobe.com/xap/1.0/mm/In PDF document text
- http://ns.adobe.com/xap/1.0/rights/In PDF document text
- http://dejavu.sourceforge.netIn PDF document text
- http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
- http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`stream_004_off000118c3.bin`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x118C3	19196 bytes
SHA-256: `39e9971ac854478aa949028f78730a143118ffe3523bfd777f83f36915d49821`
`font_00_sfnt_off0000e39d.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE39D	4984 bytes
SHA-256: `50c5cb45b741d1a506a97a98b2a2e3a7bc83ffe719265d331c1f3961ec7ac093`
`font_01_sfnt_off0000f488.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF488	10584 bytes
SHA-256: `616a442edf58b4bc97ecff6041ec7a2369b054df0d1bfb560e701df9ad7a891c`

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