PDF malware analysis — malicious · 189a9d210964374a

MALICIOUS

PDF

83.6 KB Created: 2021-03-13 18:07:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25

MD5: 02a96c7fe75ff3bf5c48fbd654d1c23d SHA-1: a71e71c789b92c71124adc4e7b49e7e280403126 SHA-256: 189a9d210964374ac2f6e8d04d8e62bd167f4817cf104fd06537e15e4bcee1e3

186 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file was flagged by multiple heuristics as a link farm and a potential phishing or malware distribution vector. The ML classifier and ClamAV detection strongly indicate malicious intent. The embedded URLs, particularly the one on 'xezojetit.ru', are suspicious and likely lead to malicious content or phishing pages. No scripts were extracted, but the PDF structure itself is designed to redirect users to external sites.

Machine Learning

Nyx PDF Classifier malicious score 0.9998

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://xezojetit.ru/award?keyword=frise+chronologique+cm1+pdf PDF link annotation
- https://static.s123-cdn-static.com/uploads/4465396/normal_5ffc13c8daa36.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4369329/normal_604051987ef93.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4376357/normal_603ea69dbf1b1.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4366057/normal_602e72cc84cff.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4426941/normal_60471c8dc94db.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4455886/normal_6049a7d9bf9fa.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4491168/normal_600b08742d190.pdfIn PDF document text
- http://www.ascendercorp.com/In PDF document text
- http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
- https://f3c4034a-4a94-4c47-b6c5-0445626d7bf8.filesusr.com/ugd/655f09_19da04cc55924717ae2a91f726cd28d7.pdf?index=trueIn PDF document text
- https://1c019786-7048-4615-837a-ae53f087c4ae.filesusr.com/ugd/8b4172_3f1e14a4c96745999ea65b6207bceb87.pdf?index=trueIn PDF document text
- https://d525ee04-2a40-494f-8ba9-fee52f7b18ee.filesusr.com/ugd/8b8e24_3d55d05f7b6b4052af72c6e2ecfbbec7.pdf?index=trueIn PDF document text
- https://s3.amazonaws.com/pizivurapab/confetti_cone_tray_template.pdfIn PDF document text
- https://s3.amazonaws.com/faluzotixupi/angry_birds_movie_soundtrack_free.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/c9ab7c84-2b7c-4659-bf84-5d291387482c/how_often_to_change_transmission_fluid_vw_passat.pdfIn PDF document text
- https://s3.amazonaws.com/tinajabizoreguf/72347001062.pdfIn PDF document text
- https://31c8a3d4-0132-49f1-a04f-09c79d03e01f.filesusr.com/ugd/a4da84_0d14103a38334198b3775c9362ccbc7d.pdf?index=trueIn PDF document text
- https://uploads.strikinglycdn.com/files/def7e891-7bb5-4fee-8e4f-a1f98aded041/cuisinart_dcc-3200bksp1_perfectemp_coffee_maker.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_off0000ef66.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xEF66	5492 bytes
SHA-256: `e4cbc34dd21f724cb432c0f51dcc65fb9de59c005d8ea7f908914503bad2644f`
`font_01_sfnt_off000101ee.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x101EE	12316 bytes
SHA-256: `9aa2417e150791a69cc064775661ce6da676fc5b6ef053ad70ee43a7064bb7da`
`font_02_sfnt_off0001294f.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1294F	16312 bytes
SHA-256: `bf8f9ece8d9d74ce2d7a98a07ee1bb8f4056faf702b3b1702118181e85f1b939`

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