PDF malware analysis — malicious · 78c6b64bd2980277

MALICIOUS

PDF

83.7 KB Created: 2021-03-07 06:44:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-29

MD5: 94c9c22795abf3c70b4f33a9c5976d0a SHA-1: 3f6f424051a59464a7c281283ba623ebc8d4de59 SHA-256: 78c6b64bd2980277e8ac3ddb9dc710c9fd441e57603273edd68481a7ee936cf4

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, specifically as a phishing trojan. It contains numerous embedded URLs, many hosted on disposable domains, pointing to other PDF files. The primary URL, 'https://ponafet.ru/strik?utm_term=how+to+gym+beginners', suggests a lure related to fitness information, likely to trick users into visiting a malicious site.

Machine Learning

Nyx PDF Classifier malicious score 0.9990

Heuristics 5

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 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://ponafet.ru/strik?utm_term=how+to+gym+beginners PDF link annotation
- https://cdn-cms.f-static.net/uploads/4412387/normal_60357e1562e04.pdfIn PDF document text
- https://nixalimug.weebly.com/uploads/1/3/2/6/132680811/kupinitasodavarata.pdfIn PDF document text
- https://gofolepoxi.weebly.com/uploads/1/3/4/8/134882907/migivekuwokul.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4403819/normal_5fd8a18888751.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4387035/normal_602bdcb3a6bdf.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4498842/normal_5fe3b805c112c.pdfIn PDF document text
- https://sapobukemofox.weebly.com/uploads/1/3/5/9/135974899/fec7035546a7.pdfIn PDF document text
- https://varijamali.weebly.com/uploads/1/3/1/8/131856150/f18cf4996fef6eb.pdfIn PDF document text
- https://milonotupilo.weebly.com/uploads/1/3/5/3/135347339/terexan-lofejip.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4498983/normal_5fe1c633e3cf1.pdfIn PDF document text
- http://mivofalo.22web.org/beautiful_life_assamese_movie.pdfIn PDF document text
- https://cdn.sqhk.co/semiwewedazi/ihEhhjl/45748006851.pdfIn PDF document text
- https://cdn.sqhk.co/kekumumaxow/ZijXjci/rocketbook_core_vs_everlast.pdfIn PDF document text
- https://tuboxivodase.weebly.com/uploads/1/3/4/3/134387713/2054098.pdfIn PDF document text
- https://fazodokivev.weebly.com/uploads/1/3/4/0/134018208/4128323.pdfIn PDF document text
- http://kuwanusefunok.iblogger.org/qms_audit_report_writing_training.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/fewifuwu/nj_port_authority_police_report_codes.pdfIn PDF document text
- http://pisumapopub.rf.gd/full_form_of_atmosphere.pdfIn PDF document text
- http://buteboregof.epizy.com/dutepewusokujurofemizupok.pdfIn PDF document text
- https://s3.amazonaws.com/nodetuxapabara/batman_arkham_origins_mod_apk_unlimited_money.pdfIn PDF document text
- https://s3.amazonaws.com/jinotugiwomo/pink_floyd_breathe_piano_sheet_music_free.pdfIn PDF document text
- https://s3.amazonaws.com/wunupalezozerud/head_to_tail_vector_addition_worksheet_answers.pdfIn PDF document text
- http://pegowalinasaduk.rf.gd/30390287460.pdfIn PDF document text
- https://s3.amazonaws.com/jobavo/juwobexifejimugipewul.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_off0000f4d7.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF4D7	5056 bytes
SHA-256: `76a9978a124db10bf1226712ff84dd3e502447ca930f88144a78800190d04e87`
`font_01_sfnt_off0001060e.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1060E	11020 bytes
SHA-256: `cab8f9bc1a75b878217641d8f866b7582b7ea04fc1ff67500f979db9fa7a65cc`
`font_02_sfnt_off00012be0.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x12BE0	16164 bytes
SHA-256: `ebd2804bff382343e08f6a42dc45f69f4e794c08b23908ae60ba78ededae74b1`

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