PDF malware analysis — malicious · 14cec29a65115ec7

MALICIOUS

PDF

92.9 KB Created: 2021-02-13 00:15:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16

MD5: 6501260ae08f535628ac7236d73fa6e7 SHA-1: ae6455212ffe37f96919b778ceaef4c6be0690e0 SHA-256: 14cec29a65115ec7faab5f366cb75a54a5e0460056e9cf687bb51dbc8854cdb4

244 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file contains a large number of embedded links, many of which point to disposable domains or redirectors, indicating a link farm or phishing attempt. The ClamAV detection and ML classifier strongly suggest malicious intent. The embedded URLs are designed to redirect users to potentially harmful sites, likely for phishing 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
PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK

PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
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.
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://yafferge.ru/123?utm_term=taco+bell+nutrition+facts+pdf In PDF document text
- https://static.s123-cdn-static.com/uploads/4426820/normal_5feb27daee02a.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4499958/normal_5fd3231ae4227.pdfIn PDF document text
- http://onesmall.space/rovaboruxlxbhc.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4488116/normal_6012b84820430.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4413244/normal_60128266eb0c7.pdfIn PDF document text
- http://zajowidased.iblogger.org/57062196262.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4527164/normal_6021b9c9c151f.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4388048/normal_6017b3677e3bd.pdfIn PDF document text
- http://regse.website/jazobazoenbfi.pdfIn PDF document text
- http://feelslike35.com/what_is_a_daddy_dom_relationshipo6pcr.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4456116/normal_5fde63cd7b98f.pdfIn PDF document text
- https://kefejuze.weebly.com/uploads/1/3/1/6/131606268/e55e1c7cee540.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4378641/normal_600b59da19cf8.pdfIn PDF document text
- http://ighelperscenter.com/batuvidadumemiremnlkg.pdfIn PDF document text
- http://mutinujevax.22web.org/46257062419.pdfIn PDF document text
- http://vsspb.ru/zilma_de_oliveira_-_educao_infantil_fundamentos_e_mtodosoe7la.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://lumawasisoxo.rf.gd/55266573676.pdfIn PDF document text
- http://wixesikive.epizy.com/serowexejipumuvenubuv.pdfIn PDF document text
- http://relilirijupike.epizy.com/disadvantages_of_whistleblowing.pdfIn PDF document text
- http://zukewanika.rf.gd/pizemiz.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_off000123ef.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x123EF	5120 bytes
SHA-256: `66486127ecaf2b889caa0a5f67394b992fdc40265070cac4abfb1a7e7a39bb51`
`font_01_sfnt_off00013555.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x13555	10092 bytes
SHA-256: `361d2dbeb718c9194f93a545eb828355746096c63cf6171044e5598de6484c10`
`font_02_sfnt_off000157df.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x157DF	4324 bytes
SHA-256: `4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3`

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