PDF malware analysis — malicious · 733bbf3095fd25ac

MALICIOUS

PDF

75.4 KB Created: 2021-03-31 04:30:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25

MD5: e4e8e6a5c86134723d05994bf42f0974 SHA-1: 8072a854838c4fa3fdab6e4016da189240350eea SHA-256: 733bbf3095fd25ac22a1ca48bdac105189d57a1627b76b6c5ccdd066d67a308a

126 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous embedded URLs, many of which point to disposable hosting and are part of a link farm, indicating a phishing or malicious redirection attempt. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of a malicious document designed to redirect users to harmful content.

Machine Learning

Nyx PDF Classifier malicious score 0.9991

Heuristics 5

ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
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://vilenefex.ru/strik?utm_term=how+to+drain+magic+chef+dishwasher PDF link annotation
- https://static.s123-cdn-static.com/uploads/4373016/normal_5fc9a4bdb19ae.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4375206/normal_6046b718caf04.pdfIn PDF document text
- http://disuxixepere.22web.org/dimowajulisukaruni.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4413473/normal_601a70558a1db.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4483623/normal_605981929679b.pdfIn PDF document text
- http://togurebuk.66ghz.com/minions_banana_song_mp4_free.pdfIn PDF document text
- http://bezufasenifeni.22web.org/bubifapimilepiratidilan.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4380528/normal_6050da039d1b9.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4370267/normal_600f41ded63d2.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4450158/normal_5feaeba0d543d.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4460694/normal_605fb569d6fc8.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4498893/normal_5fc9c39c369ce.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4409394/normal_5fcafb35275b1.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4404293/normal_5fd044452b3ab.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4505699/normal_5ff667e75f68e.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4449998/normal_601de4a9c6d12.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4476148/normal_5ff29adce8912.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4379859/normal_5fff41efcfe4f.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4481157/normal_5fd9758d57a4e.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4449965/normal_6030ea1b6e3d7.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://powejuzusar.epizy.com/trait_theories_of_leadership.pdfIn PDF document text
- http://xaxuvep.epizy.com/simple_past_tense_exercises_regular_and_irregular_verbs.pdfIn PDF document text
- http://bimumebuzof.epizy.com/mefaxam.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_off0000dcbe.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xDCBE	5244 bytes
SHA-256: `1220416fbe019dc56d74f79c9eecae18219c777e62edcb1b05ab84dc8965b349`
`font_01_sfnt_off0000ee78.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xEE78	10260 bytes
SHA-256: `3cdd400b625b7f3181efd0331ead4a6bd70a83fad050089c3da848a12492ff39`
`font_02_sfnt_off000111a6.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x111A6	4324 bytes
SHA-256: `7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71`

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