PDF malware analysis — malicious · 9679cce0884cc5ae

MALICIOUS

PDF

78.2 KB Created: 2021-02-22 01:24:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26

MD5: 437515c8e1e5ed3fddc47e8d68f5d0f8 SHA-1: 22d5a29e83ca452f4e1ce688a3ec12180f05f8b6 SHA-256: 9679cce0884cc5ae219961911ae0cbfb0bc100e06b3e48629b26c9164b1d190d

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 hosted on disposable domains, indicating a link farm or phishing attempt. The ClamAV detection and ML classifier strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URIs point towards a malicious document designed to redirect users to potentially harmful content.

Machine Learning

Nyx PDF Classifier malicious score 0.9997

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/aws?utm_term=how+to+know+its+stress+acne PDF link annotation
- https://nuvawusop.weebly.com/uploads/1/3/5/3/135302159/245828def52708.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4389823/normal_60278cbe4575f.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4450519/normal_5fd876898013a.pdfIn PDF document text
- https://jimivisimobud.weebly.com/uploads/1/3/4/9/134901817/lobewijumu.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4495707/normal_60091876160cb.pdfIn PDF document text
- https://tefajarusi.weebly.com/uploads/1/3/0/7/130775660/dotifuponedo_zilopagefipis.pdfIn PDF document text
- https://sikafajowed.weebly.com/uploads/1/3/4/7/134757433/fegiwed.pdfIn PDF document text
- http://itactical.xyz/legend_of_zelda_links_awakening_walkthrough_bookpdea6.pdfIn PDF document text
- http://8gusevshop.space/bubba_forrest_gump_quotesjcn7g.pdfIn PDF document text
- https://rolobidixogiru.weebly.com/uploads/1/3/1/6/131637372/libemok.pdfIn PDF document text
- https://ferizovewop.weebly.com/uploads/1/3/4/8/134887996/9244788.pdfIn PDF document text
- https://xejigidusulup.weebly.com/uploads/1/3/4/7/134730122/c35e4.pdfIn PDF document text
- http://dvestideyli.xyz/zosufefiwonerifivamiscw0e.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4446151/normal_602e679d9c199.pdfIn PDF document text
- https://bezulagoxirupaz.weebly.com/uploads/1/3/5/3/135347250/keroxoli.pdfIn PDF document text
- https://lososegumupabi.weebly.com/uploads/1/3/1/4/131407698/6427170.pdfIn PDF document text
- https://welomutulek.weebly.com/uploads/1/3/4/8/134873792/9803849.pdfIn PDF document text
- https://rorezumi.weebly.com/uploads/1/3/4/5/134591247/3635715.pdfIn PDF document text
- http://dkmz1.club/127588803795pj01.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://bibirosomuxir.epizy.com/uc_browser_for_pc_windows.pdfIn PDF document text
- http://dimarujevetuvif.epizy.com/tulakokesotexiperufafuk.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_off0000e967.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE967	4668 bytes
SHA-256: `9bbc1068150688243e119f9c845572acd9edfd9ba031fdae48c0ab79cf1dfb6d`
`font_01_sfnt_off0000f955.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF955	10592 bytes
SHA-256: `a3850db7d6cdd4b4ebbfc03df6d4332f4f174cf01de97afc6f5a4355887c0703`
`font_02_sfnt_off00011d69.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x11D69	4324 bytes
SHA-256: `9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2`

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