PDF malware analysis — malicious · 219472aa2d798dfc

MALICIOUS

PDF

77.1 KB Created: 2021-04-05 18:30:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23

MD5: 6ac1a9aa12f1cffbdcacf942740c09e8 SHA-1: df424890c44e0e34edac7bcca0d00b91b54b4313 SHA-256: 219472aa2d798dfc03578756d60c0661cb9dbbc83df6de5f1952dd9c39e509aa

134 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous embedded URLs, many pointing to disposable domains, and is flagged by ML classifiers and ClamAV as malicious. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a link farm designed for SEO manipulation or to host malicious content. The presence of a 'SE_DOWNLOAD_BUTTON' heuristic suggests a lure to download further content, likely malicious.

Machine Learning

Nyx PDF Classifier malicious score 0.9995

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://seumenha.ru/strik?utm_term=thermodynamics+book+for+mechanical+engineering PDF link annotation
- http://zidoruzeb.22web.org/kalender_2020_november_dezember.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4366041/normal_6006faab0a4b7.pdfIn PDF document text
- https://cdn.sqhk.co/menigopas/yBhfide/99842352625.pdfIn PDF document text
- http://gekifek.scienceontheweb.net/berliner_mauer_referat.pdfIn PDF document text
- http://kasaxeko.mypressonline.com/xelogopufitifexireto.pdfIn PDF document text
- http://jedilinosur.mywebcommunity.org/dowapag.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4402936/normal_6044d9215681f.pdfIn PDF document text
- http://libesikume.22web.org/6026431765.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4480580/normal_60175149716b2.pdfIn PDF document text
- http://wimudevereru.sportsontheweb.net/27858196233.pdfIn PDF document text
- http://levupag.22web.org/recetas_aceites_esenciales.pdfIn PDF document text
- https://cdn.sqhk.co/ragebobeb/hbohejg/xupozejubugaxebigoken.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4476780/normal_6012d5991f10b.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4387412/normal_60683ae9cdc20.pdfIn PDF document text
- http://fonixeguga.mywebcommunity.org/32343185844.pdfIn PDF document text
- https://cdn.sqhk.co/jabisopomuxo/gTifjiz/ravens_vs_steelers_predictions.pdfIn 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://rolefig.rf.gd/vagrant_tutorial.pdfIn PDF document text
- https://s3.amazonaws.com/widuxade/penarotowidepuxajob.pdfIn PDF document text
- http://jabirazefizoz.epizy.com/marketing_plan_thesis.pdfIn PDF document text
- https://s3.amazonaws.com/xapidajovaji/bisuse.pdfIn PDF document text
- http://zisukuvi.atwebpages.com/tuxevakajo.pdfIn PDF document text
- http://vurofanosikuga.atwebpages.com/54755243688.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 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000e2fb.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE2FB	5400 bytes
SHA-256: `85ad01041533b0df4ef353cade55742c1df9bd349c914435ac5a18fad0d89ea7`
`font_01_sfnt_off0000f52f.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF52F	10384 bytes
SHA-256: `d55bb8ed534cf0e6d466001ada09eca55e3afe9ce442699347a6b373d76f5d69`
`font_02_sfnt_off00011892.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x11892	4324 bytes
SHA-256: `d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378`

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