PDF malware analysis — malicious · a95f3d1cecf8e0d7

MALICIOUS

PDF

75.5 KB Created: 2021-02-22 07:29:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22

MD5: d84bad5471126734cab12da430e60f03 SHA-1: 96784f3b440f0d73a92b170f77e4af4f2306f2b6 SHA-256: a95f3d1cecf8e0d799c53da92097079bf03ff2361f13f4adfda25b1a690fb0cf

216 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document was flagged as malicious by ClamAV and an ML classifier. It uses brand-impersonation credential phishing. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

Nyx PDF Classifier malicious score 0.9996

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.
Brand-impersonation credential phishing lure critical SE_BRAND_CREDENTIAL_PHISH

Document impersonates a well-known consumer brand and uses account-security / verification language ('unusual activity', 'account on hold', 'verify your account') to steer the reader to a credential-harvesting link. Corroborated by: action link to abused redirector https://gagoduxo.weebly.com/uploads/1/3/1/4/131452981/zafogo-zerel-faperoj.pdf.
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://maypoin.ru/wix?keyword=ios+8+emoji+keyboard+apk PDF link annotation
- https://cdn-cms.f-static.net/uploads/4475737/normal_60141d1252e70.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4391009/normal_600aa9515f5b4.pdfIn PDF document text
- http://pannochki-art.com/myspanishlab_chapter_11_answersd6j6l.pdfIn PDF document text
- https://gagoduxo.weebly.com/uploads/1/3/1/4/131452981/zafogo-zerel-faperoj.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4413108/normal_600747656d6f5.pdfIn PDF document text
- https://gokuxevi.weebly.com/uploads/1/3/4/0/134017514/e7cd4412d52889.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4450340/normal_5ffbc42b06562.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4461751/normal_6004a43301bfc.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4368978/normal_5fd7a0f1cb409.pdfIn PDF document text
- http://bogplaktnc.fun/1944825232r0r9n.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4411932/normal_60148dc83ab50.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4447662/normal_5fd071928f217.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4460963/normal_5fe39c32502aa.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4378404/normal_60236959bb7b6.pdfIn PDF document text
- https://kolijegidixut.weebly.com/uploads/1/3/1/3/131379325/6229767.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4485445/normal_6004d2de1c7e8.pdfIn PDF document text
- https://bibomezu.weebly.com/uploads/1/3/2/7/132710601/144776.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4426269/normal_60017e01e8abd.pdfIn PDF document text
- http://djami.ru/h_m_girl_size_guidejrwx6.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4420014/normal_5fff565b18348.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://s3.amazonaws.com/dufekifaral/tujukaxujewoka.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_off0000db8f.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xDB8F	5188 bytes
SHA-256: `107f39c53dcf0316fbb74895a2862a5c15ccbf4b02de58e6c0f18ddf358908a2`
`font_01_sfnt_off0000ed2f.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xED2F	10560 bytes
SHA-256: `5da4cbe5f3524fde6a7b669a52eb1e27ddffe5c87cb665d49f24e5899d76dbfc`
`font_02_sfnt_off0001112a.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1112A	4324 bytes
SHA-256: `d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378`

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