PDF malware analysis — malicious · fb7e03b714886932

MALICIOUS

PDF

80.5 KB Created: 2021-03-27 13:56:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25

MD5: 3eaa20c3b6c13f3070a2a8208443e5d6 SHA-1: 27ff8e3d394ab957fd776c044b24d098e611bf4d SHA-256: fb7e03b714886932aaccd2b731ca80c482f336bb2073be37fd7246d8f455af40

126 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file was flagged by ML classifiers and ClamAV as malicious, indicating a phishing or trojan threat. It contains numerous embedded URLs, many pointing to disposable domains, suggesting a link farm designed to redirect users to malicious sites. The presence of PDF_SEO_DISPOSABLE_LINK_FARM heuristic further supports this, indicating a tactic to obscure malicious intent through a large number of links on potentially compromised or disposable hosting.

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://jacksth.ru/strik?utm_term=convert+photo+to+line+drawing+online+free+apple PDF link annotation
- https://static.s123-cdn-static.com/uploads/4445320/normal_5fef9685170c9.pdfIn PDF document text
- https://cdn.sqhk.co/gopuxipo/igw6mvi/xolena.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4406806/normal_604e35d198444.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4493282/normal_600b2cc947175.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4424645/normal_60265c9c1b5f5.pdfIn PDF document text
- https://cdn.sqhk.co/sekigizakeku/OmZ5jhy/tavadiraxadubonovitemubu.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4367294/normal_60090c01b9480.pdfIn PDF document text
- https://cdn.sqhk.co/zajagatetode/k8feifI/disorderly_conduct_definition_wisconsin.pdfIn PDF document text
- https://cdn.sqhk.co/pubisifibuj/iehdxjj/bollywood_dance_video_songs_2020.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4427504/normal_6044ff616a194.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4457839/normal_6014d55cc4d07.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4491723/normal_5fe1b2fd6a71c.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://jilizowo.rf.gd/how_to_install_plugins_in_sketchup_2019.pdfIn PDF document text
- http://mirabawuwoku.epizy.com/fatunanuripuxavujabib.pdfIn PDF document text
- https://74269c25-1731-4359-90d4-804f54ef9c1c.filesusr.com/ugd/b5973a_12c209a6d31e41e4ab640dd6016a7c81.pdf?index=trueIn PDF document text
- https://s3.amazonaws.com/mavixu/eddystone_url_android.pdfIn PDF document text
- http://rupijelovugibiz.rf.gd/annamayya_telugu_naa_songs_free.pdfIn PDF document text
- https://b5526579-b22d-45a0-8251-9885a72cf3eb.filesusr.com/ugd/0cd019_54b4e1a88bc34921bc50ba5aeb6275b0.pdf?index=trueIn PDF document text
- https://s3.amazonaws.com/regovadeje/64273393621.pdfIn PDF document text
- https://s3.amazonaws.com/kelageketisefuv/accel_world_light_novel.pdfIn PDF document text
- https://s3.amazonaws.com/libeganot/98213667069.pdfIn PDF document text
- https://0e9c393c-9feb-4465-ae9d-4486bea7a644.filesusr.com/ugd/4b68be_b31191591cc94ba28bb49806fcdd02e1.pdf?index=trueIn 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 4

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000e256.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE256	2900 bytes
SHA-256: `ea2be6eb89ab0d183412f8be2b49d14b97937311539abd67af8ccd1153281577`
`font_01_sfnt_off0000ecb1.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xECB1	5088 bytes
SHA-256: `fdbd496d2c353d89cb02a0695b5d53aaa012090ea1143bd29f198232e36f4f57`
`font_02_sfnt_off0000fe0d.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xFE0D	11116 bytes
SHA-256: `76c617c32ac4165dccba526d97fdae39a269724e4ad3b827706d65f7d713a372`
`font_03_sfnt_off00012411.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x12411	4324 bytes
SHA-256: `a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f`

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