PDF malware analysis — malicious · 3fbb28dbb9254e70

MALICIOUS

PDF

87.4 KB Created: 2021-02-26 20:45:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15

MD5: 56f064a724c9387fee71882bb1387b32 SHA-1: 4d3685913ec858f40a806dc65a16f40b9bbec965 SHA-256: 3fbb28dbb9254e702e89cfe93c35305cd544ae4877378fe2b1adb19a9634f760

186 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file contains a large number of external links, many pointing to disposable domains, suggesting a link farm or SEO spamming operation. The primary URL, 'https://fokemale.ru/strik?utm_term=2007+vw+jetta+owners+manual+free+download', is presented as a search result for a technical manual, likely a lure to encourage downloads. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware distribution.

Machine Learning

Nyx PDF Classifier malicious score 0.9997

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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM

Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
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://fokemale.ru/strik?utm_term=2007+vw+jetta+owners+manual+free+download PDF link annotation
- https://baxomowimesadud.weebly.com/uploads/1/3/5/3/135303612/1405393.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4365607/normal_5fd822498d152.pdfIn PDF document text
- https://wiwazojuxosupud.weebly.com/uploads/1/3/1/3/131379189/1647526.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4402032/normal_6033c02029ae3.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4450517/normal_602b5af0eaae0.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4393901/normal_5febdfda8eb17.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4420764/normal_60235fd843ef4.pdfIn PDF document text
- http://dresdenpharma.ru/donibumodibejoih61x.pdfIn PDF document text
- https://fufukarebalomok.weebly.com/uploads/1/3/4/3/134352968/vizuvakukeso.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4422640/normal_6003643d04955.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4477658/normal_5fdbbc94db0cf.pdfIn PDF document text
- https://terunutu.weebly.com/uploads/1/3/5/3/135319236/nitabujiwawonijusana.pdfIn PDF document text
- https://vawudida.weebly.com/uploads/1/3/4/8/134890241/08b4a14.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4469143/normal_6025ac56e79d0.pdfIn PDF document text
- http://www.ascendercorp.com/In PDF document text
- http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
- https://s3.amazonaws.com/tojazudibumogab/antas_ng_wika_worksheet_grade_7.pdfIn PDF document text
- https://s3.amazonaws.com/bevekizadoxuj/vampyr_ign_guide.pdfIn PDF document text
- https://s3.amazonaws.com/mudurixo/xovowatodowaxefajul.pdfIn PDF document text
- https://s3.amazonaws.com/rurosaveruk/copy_conditional_formatting_to_another_spreadsheet.pdfIn PDF document text
- https://s3.amazonaws.com/sogovekevi/ganesh_bhakti_song_dj_mix.pdfIn PDF document text
- https://s3.amazonaws.com/lovomijelun/nafupimuxifefuruxeg.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
- http://dejavu.sourceforge.netIn PDF document text
- http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off00010066.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10066	5540 bytes
SHA-256: `9f3f7641128fcbf99a0ea3897d9f2260d78a1e82433c01c5e269b40c5050c813`
`font_01_sfnt_off00011342.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x11342	10772 bytes
SHA-256: `5489ff0e913781a78e50a9d7582cea10597336e50ca90c577d788cb9178d0d70`
`font_02_sfnt_off000137c3.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x137C3	16868 bytes
SHA-256: `069dd34e1358faf6c9d1f9f3835ece6d651941ff0100380b824cf13441af57b5`

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