PDF malware analysis — malicious · 9f2c7d52d807b72b

MALICIOUS

PDF

72.7 KB Created: 2021-04-09 21:45:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21

MD5: e318cbb63f26bef2bfb4c811ca3f6b26 SHA-1: 7832b269eb8d55b52b7510f3b1b1c3aa4e53162d SHA-256: 9f2c7d52d807b72b7df11f5fa35e988e64714def5491fb3c21143d990c894cc2

186 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a significant number of external links, many pointing to disposable hosting, indicating a link farm designed to direct users to potentially malicious sites. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and numerous external URIs suggest it's designed to exploit users by redirecting them to compromised or malicious web content.

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://baarspo.ru/strik?utm_term=how+to+fly+a+sky+rover PDF link annotation
- http://stroiline74.ru/ropuzemapijijozulikexig5i0fb.pdfIn PDF document text
- https://zigajimimokok.weebly.com/uploads/1/3/1/3/131383588/393ef80.pdfIn PDF document text
- http://lnstagramcopyrightservices.org/cisco_dta_170hd_remote_codestlj97.pdfIn PDF document text
- http://gk-kuban.ru/kelagotx8z49.pdfIn PDF document text
- https://gowumobajakexe.weebly.com/uploads/1/3/4/5/134585768/f7ed19b6.pdfIn PDF document text
- https://penaxixix.weebly.com/uploads/1/3/0/8/130813526/worebewu-tupemufebizoz-rexasiromivap-nupifitofejutuj.pdfIn PDF document text
- https://cdn.sqhk.co/vitimosugu/gg3ujiz/hex_file_compare_tool_windows.pdfIn PDF document text
- https://ripukalogud.weebly.com/uploads/1/3/4/3/134391837/wekolozakipudune.pdfIn PDF document text
- https://cdn.sqhk.co/nefakovuwot/chAewge/stunt_bike_freestyle_apk_mod_money.pdfIn PDF document text
- http://com-servers.online/lexajoxetatag2hfd9.pdfIn PDF document text
- http://gratoramaa.website/ridikenalojedld5n.pdfIn PDF document text
- http://blancer.xyz/84195692726kgp9e.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
- https://cfc603e6-7cd4-4c42-812b-9722deb80ae4.filesusr.com/ugd/0e9fc2_472eec54300944d78e84956a904e9102.pdf?index=trueIn PDF document text
- https://f7e05ffc-afae-4d19-be15-7e9c659e5e5f.filesusr.com/ugd/72f62b_c392854eadfa4794a6fdbaff88af2ed2.pdf?index=trueIn PDF document text
- https://uploads.strikinglycdn.com/files/785f0ca8-c6b0-451f-892e-1a98a1b65751/how_much_formula_does_wic_give_you_in_nj.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/72f3a071-e563-43f3-89ce-422cee4a7434/vinamu.pdfIn PDF document text
- https://9b704b87-3668-414c-a24e-b30400fe0e33.filesusr.com/ugd/51c472_3da27c5eb35a4822acd2a7eff60bade6.pdf?index=trueIn PDF document text
- https://979cd01f-16ea-4d2c-b189-234964c95597.filesusr.com/ugd/d4c4cf_17cb7bd44521419186da4712d98cdfa4.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 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000d381.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xD381	4672 bytes
SHA-256: `70ea13eb6ac6cdece7f626cf6a9986013774fa5cd63af8ae16655b6183ee2160`
`font_01_sfnt_off0000e38d.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE38D	10668 bytes
SHA-256: `5da44752468eb68e9759dfcd77c5c399b3f6e744a88921437195dd92d8a4f82e`
`font_02_sfnt_off000107e0.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x107E0	4324 bytes
SHA-256: `9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2`

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