PDF malware analysis — malicious · b9752488c92fb4a8

MALICIOUS

PDF

85.6 KB Created: 2021-03-20 11:57:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20

MD5: ba30162a3e1eb1e644e6a58660b0fe94 SHA-1: f5b51d8edb1d9fa34cd34e6ad7488b7533035761 SHA-256: b9752488c92fb4a887a31786e910190d6626c1a76276c504bed68054141d84d1

186 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was identified as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains a large number of external links, many pointing to disposable domains, which is characteristic of SEO spam or phishing campaigns. The presence of embedded URLs and the PDF_SEO_LINK_FARM heuristic strongly suggest the document's purpose is to redirect users to potentially harmful content or facilitate further distribution.

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://lozipotod.ru/123?utm_term=medical+acronyms+and+abbreviations+pdf PDF link annotation
- https://nezuvaju.weebly.com/uploads/1/3/0/9/130969963/0bd2dbf75.pdfIn PDF document text
- http://pazolozul.mypressonline.com/85611246388.pdfIn PDF document text
- https://zadujemerumid.weebly.com/uploads/1/3/2/6/132695269/lamuxiseseb-fopitutenejuso-golevov-karizekufewu.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4419637/normal_603130672c042.pdfIn PDF document text
- https://rovibabewovel.weebly.com/uploads/1/3/4/8/134884015/012c693532a625.pdfIn PDF document text
- http://good-production9.site/pokemon_silver_walkthrough_kantok23ti.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4461770/normal_6006ab7eaa019.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4444638/normal_60330575758fd.pdfIn PDF document text
- https://rabofabi.weebly.com/uploads/1/3/0/8/130813834/wawagapoxapuw-moluwavirop-gezes.pdfIn PDF document text
- https://majujeleku.weebly.com/uploads/1/3/4/5/134590665/345ce581.pdfIn PDF document text
- https://cdn.sqhk.co/nigalasiline/cjaDDgJ/simple_calendar_widget_not_refreshing.pdfIn PDF document text
- https://cdn.sqhk.co/fugapaloter/gUliaDu/top_driving_simulator_games_for_android.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4466151/normal_5ff86dc4aedcc.pdfIn PDF document text
- http://leyloften.online/best_32_inch_1080p_smart_tv_ukzbtuz.pdfIn PDF document text
- https://cdn.sqhk.co/kuruwoke/7Qhj4gd/79879044642.pdfIn PDF document text
- https://cdn.sqhk.co/kewukapugino/Khbtid0/zombie_crime_shooting_games_ps4.pdfIn PDF document text
- https://gubilipolijig.weebly.com/uploads/1/3/4/7/134707964/c93d66.pdfIn PDF document text
- https://cdn.sqhk.co/zedawuzijis/aLLDWge/modern_tv_cabinet_design_ideas.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://forojiwimudobo.atwebpages.com/nelson_handwriting_sheets_year_3.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off00010239.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10239	5396 bytes
SHA-256: `8acdf7fbeb4826c639b4ef2db9981b5dd0634e60ba5f9189cf0cc1dd09b02e42`
`font_01_sfnt_off0001147b.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1147B	11372 bytes
SHA-256: `9521a8ad8bef66e4c483a7fbd53707e7b73393f1dfd818fc639201dbbd9c9f36`
`font_02_sfnt_off00013af9.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x13AF9	4324 bytes
SHA-256: `a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f`

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