PDF malware analysis — malicious · a620e7c58f661c0e

MALICIOUS

PDF

72.9 KB Created: 2020-12-21 14:46:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05

MD5: 963eff494fadb01b71ee78395af54516 SHA-1: b46ae957f55b5a7777f487d575b8b04baeee9e6e SHA-256: a620e7c58f661c0e44f5956500ea6b22f786a8aa0eb3d7c7b7d35c6f7528840e

186 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a large number of external links, identified by the PDF_SEO_LINK_FARM and PDF_SEO_DISPOSABLE_LINK_FARM heuristics. The ML classifier and ClamAV detection strongly indicate maliciousness. The primary attack pattern involves redirecting users through a series of links, likely to a link farm or to distribute further payloads, as suggested by the numerous external URLs found.

Machine Learning

Nyx PDF Classifier malicious score 0.9998

Heuristics 6

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 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://trafftec.ru/strik?utm_term=loophole+in+spanish PDF link annotation
- https://dojoxokixen.weebly.com/uploads/1/3/4/8/134878929/8854325.pdfIn PDF document text
- https://fanawilixu.weebly.com/uploads/1/3/1/4/131408209/ranituzoxusavogew.pdfIn PDF document text
- https://nokiziwevapof.weebly.com/uploads/1/3/4/5/134507241/gativuwelojagusow.pdfIn PDF document text
- https://likifovufuli.weebly.com/uploads/1/3/4/5/134588617/d9b62e847076.pdfIn PDF document text
- https://lisiruzefixa.weebly.com/uploads/1/3/4/4/134495270/pubepube_wufototabex.pdfIn PDF document text
- https://tigafuxofezez.weebly.com/uploads/1/3/4/3/134363272/5198374.pdfIn PDF document text
- http://www.ascendercorp.com/In PDF document text
- http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
- https://uploads.strikinglycdn.com/files/3c480f1d-6b6a-434b-ac5d-755e696fa87e/lomasotedigazipu.pdfIn PDF document text
- https://static1.squarespace.com/static/5fc1571bc30a162e0c558f21/t/5fc425ffe18c5c478e7e147a/1606690304816/business_analysis_techniques_72_essential_tools_for_success.pdfIn PDF document text
- https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbf5aea18e72e5fdbcf106a/1606376176621/trigonometry_the_law_of_cosines_worksheet.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/80827bcf-aca2-48d9-9051-0382e9517263/runescape_ranging_guide.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/c2d0c6c6-8bf3-45c7-a560-45a07de618a7/bakeluvetikasidof.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/27e98b60-6ac2-47f9-9456-feb631996b29/jedirozip.pdfIn PDF document text
- https://static1.squarespace.com/static/5fc55652239b0722914ec2bc/t/5fcf115c0ff3944fc5526f32/1607405916773/morifurewujisusifetenet.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/1cd8608d-67ec-4d3b-950e-328405187c43/44983538720.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/3d4743b4-6da8-4faa-b533-eddf0eecbbc1/susorixozaz.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_off0000cb95.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xCB95	4752 bytes
SHA-256: `bc650a8ad3a2e1df34b9d8f2c58192e64ccd61998821d6e80d4502c9b0e9361c`
`font_01_sfnt_off0000dbbd.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xDBBD	11524 bytes
SHA-256: `1811e5a34c916814c0158a5beba64dd9bc84f33476d4dc89b32dde938c8c3f9d`
`font_02_sfnt_off00010180.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10180	16068 bytes
SHA-256: `b87f97ee19d0eebf852dd88b0ab32469aeb165aad349e9abc0ff3cff3eb64326`

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