PDF malware analysis — malicious · f778bab1133ff8f4

MALICIOUS

PDF

118.6 KB Created: 2021-06-08 07:11:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25

MD5: 7584608ba0f43677bf8aa86cd5d286f7 SHA-1: 3ce4f2ea1948ad3e8e2e3bf56fd6caef49fad3c1 SHA-256: f778bab1133ff8f4f84de37cdfff2ba26eb63e33778146b8fa31cba6fa914b16

126 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains numerous embedded URLs, with one prominent URL suggesting a lure for downloading a movie, which is a common tactic for phishing or malware distribution. The PDF structure and embedded links point towards a link farm used to redirect users to malicious sites.

Machine Learning

Nyx PDF Classifier malicious score 0.9994

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://archism.ru/pbw?utm_term=arjun+reddy+full+movie+download+in+kuttymovies.net PDF link annotation
- https://static.s123-cdn-static.com/uploads/4452865/normal_5fc62376c45db.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4449012/normal_5fd1bb2453c18.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4408462/normal_60622b74d641e.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4503987/normal_602afa2773ab9.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4374847/normal_601336d5d345e.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4413458/normal_603fc595a31bb.pdfIn PDF document text
- https://static.s123-cdn-static-d.com/uploads/4418579/normal_60b6e17c02755.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4416143/normal_5ffe8cc921521.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4427783/normal_5fde81a0d1198.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4443598/normal_604bb59b65e77.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4393631/normal_6054c3b2d5c35.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4483070/normal_606a51ad25acf.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4458150/normal_5fd7b88a7b5b9.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://wuxikadafi.pbworks.com/f/kaguguwubid.pdfIn PDF document text
- http://kepojijudiva.pbworks.com/f/la_utilizacion_de_las_funciones_exponenciales_en_la_vida_cotidiana.pdfIn PDF document text
- http://foziwedugumu.pbworks.com/f/52442099706.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/adc54108-1062-483d-80b5-8bf5a63e7e80/30986196583.pdfIn PDF document text
- http://gupiguna.pbworks.com/w/file/fetch/144548487/taekwondo_black_belt_grades.pdfIn PDF document text
- http://vadibun.pbworks.com/f/how_to_root_android_phone_with_terminal_emulator.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/ea7bb9c3-0c41-4623-950f-0b55797cfe97/75253850270.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 4

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off00016e70.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x16E70	5352 bytes
SHA-256: `2ee31726427d07f86dd529c11aa6d30faa40dca769579e591627a57988d0f0de`
`font_01_sfnt_off000180a6.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x180A6	11500 bytes
SHA-256: `0ac171c0f343769721f7de78d596005a0cd708b1dbe9af9b5af7fed75661d948`
`font_02_sfnt_off0001a830.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1A830	16164 bytes
SHA-256: `e296a61d2d303e35be9e1a35631556663d2780498efa7e8f3867bf557f172fe6`
`font_03_sfnt_off0001bd47.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1BD47	4324 bytes
SHA-256: `cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34`

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