PDF malware analysis — malicious · a764cb6c2d1efc0e

MALICIOUS

PDF

88.6 KB Created: 2021-03-31 01:14:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20

MD5: 59a1eda36019dfa9e242f5338074803b SHA-1: 233c532d69187cb6a42aea5c9d198ae179431f7a SHA-256: a764cb6c2d1efc0e370c41d9d58d73d02d0cfa4a93b97b7642f533d9a7b2359d

186 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm or redirection scheme. The embedded URLs and the PDF structure point towards an attempt to direct users to malicious websites, potentially for credential harvesting or malware distribution.

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/123?utm_term=sql+format+date+mm%252F+yyyy PDF link annotation
- https://xisubuto.weebly.com/uploads/1/3/1/3/131380177/3132880.pdfIn PDF document text
- https://xixilizuxuwogag.weebly.com/uploads/1/3/4/8/134879277/rofavej.pdfIn PDF document text
- http://sunny-web.ru/bapopilabavol88gpd.pdfIn PDF document text
- https://bibatajikoxego.weebly.com/uploads/1/3/5/3/135315017/9610836.pdfIn PDF document text
- https://veworokog.weebly.com/uploads/1/3/1/6/131606039/fiwesuwopiki_kadegila_wivupum.pdfIn PDF document text
- https://paxepogemikut.weebly.com/uploads/1/3/5/3/135316128/8595855.pdfIn PDF document text
- https://sibanomo.weebly.com/uploads/1/3/0/9/130969588/5d06eda80.pdfIn PDF document text
- https://karifizamazo.weebly.com/uploads/1/3/1/3/131383674/1195056.pdfIn PDF document text
- http://meriline.store/402353757580mdcv.pdfIn PDF document text
- http://getveran.site/48411411527k485o.pdfIn PDF document text
- http://www.ascendercorp.com/In PDF document text
- http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
- https://71e5fc8e-cc9a-4633-96c3-2c70acd464d0.filesusr.com/ugd/f08e01_3ca92bbb54ce42df9cce33d21e90b6e2.pdf?index=trueIn PDF document text
- https://uploads.strikinglycdn.com/files/a96e61df-02c7-49c4-92fc-7be133a2c038/environmental_ethics_issues_and_possible_solutions_ppt.pdfIn PDF document text
- https://48936d5e-4b15-4059-a328-ddb12afcc15e.filesusr.com/ugd/173145_9dd6c750a3824f4bb188a34b5ddcb01d.pdf?index=trueIn PDF document text
- https://uploads.strikinglycdn.com/files/7d28199c-6c33-419a-b75c-134ed0f7bde2/lijer.pdfIn PDF document text
- https://a8fdb364-3865-4521-a36b-e12f4de7752f.filesusr.com/ugd/e20637_8858a0a0b4e746e8979c1210a1cfad99.pdf?index=trueIn PDF document text
- https://de7eff9d-5c50-4122-bb99-ee112abf7a8f.filesusr.com/ugd/db8f21_14d63ae1810d47218b95ead7c024ede5.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
- 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_off000104d2.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x104D2	5240 bytes
SHA-256: `114f09f1e8a0dd64b2542526784bdaa48599e28224dffac663f75d0766ace211`
`font_01_sfnt_off0001169c.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1169C	12200 bytes
SHA-256: `2684d9356a07f53d86212736cd39da522fd30d7c03c6668be389d81f44d415c6`
`font_02_sfnt_off00013ed7.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x13ED7	16512 bytes
SHA-256: `ca450933b4fd2b01a76b436e599e4c41d71844236f22159b2296115e836d67dd`

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