PDF malware analysis — malicious · c25adf2ecaf22eda

MALICIOUS

PDF

82.0 KB Created: 2021-03-17 20:01:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20

MD5: c51cc5fc687a7e60926e8f45ed324170 SHA-1: 34543b517b970f376bedd7253f466e2868a4dc1f SHA-256: c25adf2ecaf22edaff89142e5dbef5756d5f914f91555f0036c465e469ea055a

186 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file is identified as malicious by multiple heuristics and an ML classifier, and ClamAV detects it as a phishing trojan. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm or phishing operation. The embedded content, though heavily obfuscated, appears to be a lure for MP3 downloads, likely to redirect users to malicious sites.

Machine Learning

Nyx PDF Classifier malicious score 0.9991

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://pelibifir.ru/strik?utm_term=exo+playboy+mp3+download+ilkpop PDF link annotation
- https://taboloralo.weebly.com/uploads/1/3/2/7/132741194/7c48dfa.pdfIn PDF document text
- https://buzubexod.weebly.com/uploads/1/3/4/0/134017192/zewiginosoxupogenev.pdfIn PDF document text
- https://moviwinexanasi.weebly.com/uploads/1/3/4/3/134314602/cad4e3b6cd2.pdfIn PDF document text
- https://widuboxizivibib.weebly.com/uploads/1/3/4/3/134315701/8626019.pdfIn PDF document text
- http://suwefazimim.medianewsonline.com/limebu.pdfIn PDF document text
- https://bixuduserar.weebly.com/uploads/1/3/4/8/134861961/ffd08574397bf80.pdfIn PDF document text
- https://gebobofivogaxe.weebly.com/uploads/1/3/5/3/135308574/4681352.pdfIn PDF document text
- https://vegirizekor.weebly.com/uploads/1/3/1/4/131407876/biwuxi_vawoxasakivubuz.pdfIn PDF document text
- https://sasanufodokedu.weebly.com/uploads/1/3/0/9/130969760/72786feeaff1.pdfIn PDF document text
- https://nusisudarebo.weebly.com/uploads/1/3/4/3/134349377/598999.pdfIn PDF document text
- http://kunepuvobimamin.medianewsonline.com/arqueologia_industrial.pdfIn PDF document text
- https://fekadoripegat.weebly.com/uploads/1/3/4/5/134592683/vowur.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4464078/normal_602bb4912f4d9.pdfIn PDF document text
- https://wigazasadus.weebly.com/uploads/1/3/5/9/135974004/864981.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4366022/normal_5ff2539808b63.pdfIn PDF document text
- https://misekijenag.weebly.com/uploads/1/3/1/3/131380320/3344a8d8.pdfIn PDF document text
- https://jebapawobukil.weebly.com/uploads/1/3/4/5/134521284/2130163.pdfIn PDF document text
- https://jowapiwinutakun.weebly.com/uploads/1/3/4/3/134365581/8586004.pdfIn PDF document text
- https://rawamujorutemet.weebly.com/uploads/1/3/4/3/134360263/8a9bae3b0d982.pdfIn PDF document text
- http://www.ascendercorp.com/In PDF document text
- http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
- https://12dd324c-696b-4d67-8c19-991f3eacec2c.filesusr.com/ugd/eeb7bd_853ad979313c4093ba487e06c312d5db.pdf?index=trueIn PDF document text
- https://3c86e5df-9a55-47dd-9d5b-c207b25ec6cd.filesusr.com/ugd/72bf36_443e5ade5b984772821e3864400c2381.pdf?index=trueIn PDF document text
- https://6440a9f6-5e82-4153-977b-4ffe9374ec4a.filesusr.com/ugd/7182f3_0ede40576d73407f86d0121c97b57791.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 4

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000dbf8.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xDBF8	4508 bytes
SHA-256: `d7ecfd7c0a0529d3bafb4a63308810d88df600a175f328a590345d9b17068a97`
`font_01_sfnt_off0000ebeb.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xEBEB	5416 bytes
SHA-256: `ae71830b6ceabfdb1cb998162068c92e160e0bc1ab90cf7d16491c1d5e10da9e`
`font_02_sfnt_off0000fe69.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xFE69	11136 bytes
SHA-256: `1303d438f55075ab0647f7ec1df39befd537c0b9f6c4a421d9a3e5fbfef0a8db`
`font_03_sfnt_off000124ee.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x124EE	16140 bytes
SHA-256: `2732c78df68b4531e26da51a256f0f9ab881cb8a96d1886ade34872d88eeece3`

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