PDF malware analysis — malicious · d954bfd86cd7c59a

MALICIOUS

PDF

85.7 KB Created: 2021-06-10 04:22:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23

MD5: 3739dea74663b10815b2c0d733478fdf SHA-1: 1d60aa23faa3544d07354f23b411205f56120ad2 SHA-256: d954bfd86cd7c59aef3623c73887196afe0c6dc9a31df5055384de2667cb2cc4

134 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

Nyx PDF Classifier malicious score 0.9996

Heuristics 6

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.
Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON

Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
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://coretry.ru/pbw?utm_term=current+affairs+monthly+magazine+free+download+pdf PDF link annotation
- https://static.s123-cdn-static.com/uploads/4389106/normal_5fcefd8e359fc.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4480758/normal_604ba01ecba83.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4486548/normal_606cc3bd3fa75.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4479224/normal_5fe9626478354.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4451551/normal_606414d3921d1.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4456132/normal_5fdf921464bf2.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4490001/normal_60ba53423b847.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4374009/normal_60476429a1fce.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4484370/normal_5fd053785a24e.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4464865/normal_5fecc636b129a.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4449777/normal_5fe45d8902e15.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4449185/normal_60449162ddb05.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4366044/normal_5fef0f80a9114.pdfIn PDF document text
- http://fedorahosted.org/lohitIn PDF document text
- http://www.ascendercorp.com/In PDF document text
- http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
- http://www.daltonmaag.com/In PDF document text
- http://tosuvop.pbworks.com/w/file/fetch/144718710/girl_scout_brownie_making_games_badge_requirements.pdfIn PDF document text
- http://baxikufop.pbworks.com/w/file/fetch/144883599/witajuzurowoseguvowukav.pdfIn PDF document text
- http://zuwofig.pbworks.com/w/file/fetch/144532974/kiwi_bird_fun_facts.pdfIn PDF document text
- http://fepewuwakow.pbworks.com/f/91080388360.pdfIn PDF document text
- http://xalomuzavege.pbworks.com/w/file/fetch/144438321/how_to_cook_a_petite_sirloin_roast_in_the_oven.pdfIn PDF document text
- http://zanikofepaj.pbworks.com/w/file/fetch/144642957/best_coc_th_11_base.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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`stream_004_off0000f62b.bin`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0xF62B	10084 bytes
SHA-256: `7d8e62125915d122b8aaeb489370967b067b89e59b97f3f81db03d678ea62c75`
`font_00_sfnt_off0000e324.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE324	5604 bytes
SHA-256: `8fc349a3fc3104c054fb09b5cc83f5a098f7bac12779f2d1270992118dd00d95`
`font_02_sfnt_off0001111e.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1111E	11352 bytes
SHA-256: `8631039f0feebc4108dc7aef75a42f1c449c5a33206bdc083c37eaee041025a3`
`font_03_sfnt_off000137db.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x137DB	4324 bytes
SHA-256: `ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230`

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