PDF malware analysis — malicious · f3ec7f6a7c8977b2

MALICIOUS

PDF

72.1 KB Created: 2021-06-14 08:16:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27

MD5: c2cc40a1a0581c2721a7952d7626b022 SHA-1: 0acc5c045ed22b553f9778f9802ae4c6349247a3 SHA-256: f3ec7f6a7c8977b25438503e5b1df0ccebed54c454c98ad65142a3cc437ce2e4

186 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file contains a large number of external links, many hosted on disposable domains, suggesting a link farm or SEO spam campaign. The primary URL, 'https://ketchas.ru/pbw?utm_term=ek+mulaqat+zaruri+hai+sanam+new+song', appears to be a lure. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution.

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://ketchas.ru/pbw?utm_term=ek+mulaqat+zaruri+hai+sanam+new+song PDF link annotation
- https://mumerigowijegap.weebly.com/uploads/1/3/4/7/134771458/8403517.pdfIn PDF document text
- https://voguxobone.weebly.com/uploads/1/3/1/3/131379379/4883194.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4471092/normal_606db6267d9d6.pdfIn PDF document text
- https://foseporeduxu.weebly.com/uploads/1/3/4/7/134765976/gokuwek-mezemigine.pdfIn PDF document text
- https://kamurodogoruvax.weebly.com/uploads/1/3/4/8/134887894/e3f8d.pdfIn PDF document text
- https://ronogutelujevur.weebly.com/uploads/1/3/5/9/135956648/7345775.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4389823/normal_5fe15caca369e.pdfIn PDF document text
- https://zawupudoj.weebly.com/uploads/1/3/4/7/134726705/da257d.pdfIn PDF document text
- https://ledugatikafaf.weebly.com/uploads/1/3/4/6/134693541/c04263b.pdfIn PDF document text
- https://tavadarikozo.weebly.com/uploads/1/3/5/9/135987174/3287156.pdfIn PDF document text
- https://kuxobemif.weebly.com/uploads/1/3/1/3/131379353/3788847.pdfIn PDF document text
- https://wimupivirexov.weebly.com/uploads/1/3/4/9/134901171/janulavuk-dapokovupakimo-jikowitas-gekev.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://uploads.strikinglycdn.com/files/ecf9264e-228b-4404-bde5-62be3adf76b2/tifuluzifalaleripekajiw.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/962d795b-b43b-4ee6-9e77-25deb69610f4/q-see_qs206_dvr_manual.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/787a545a-1866-48f5-914f-a5e2c97641f5/28870856135.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/e4157bb6-9612-4eae-9f6a-96cf4c75be14/crochet_beanie_patterns_for_beginners.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/2741d6ea-5b78-46d1-b52c-b62a905f3c38/what_is_the_best_dr_joe_dispenza_meditation.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_off0000cf85.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xCF85	5272 bytes
SHA-256: `e60d9e3eecf17d91c18e61b238baa4d1905cfcb1200c79a91f0cc84e29ab3924`
`font_01_sfnt_off0000e162.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE162	10520 bytes
SHA-256: `cfe14a56093eabfd407ce714a02fb69ad741463dc88b81469d418bf51b3a3f0a`
`font_02_sfnt_off00010520.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10520	4324 bytes
SHA-256: `ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3`

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