PDF malware analysis — malicious · 3bb4b23336d8e4e1

MALICIOUS

PDF

85.0 KB Created: 2021-05-27 11:01:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22

MD5: d7fb7b259bd547aa1f55261c31a441a2 SHA-1: 8239dcd22c82f2aac6ad575888f789d5ef4dd552 SHA-256: 3bb4b23336d8e4e1e62fcc68ae7b81d0deefc10893a816ab76673c5a17ff36a6

164 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. The file embeds a large number of external links characteristic of an SEO link farm and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

Nyx PDF Classifier malicious score 0.9990

Heuristics 6

ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
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.
Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON

Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
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://zajinet.ru/strik?utm_term=off+road+outlaws+mod+apk+download PDF link annotation
- https://vodefuba.weebly.com/uploads/1/3/4/6/134688083/c234c9.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4463803/normal_602dc9f36a891.pdfIn PDF document text
- https://kofejadadamutu.weebly.com/uploads/1/3/4/3/134348877/2734605.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4460465/normal_6049ed059c4a7.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4370078/normal_6039da44b671e.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4386089/normal_60228f11244cf.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4414682/normal_5fd887f8a6c56.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4418013/normal_606dd000b3fa5.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4380219/normal_601198cd9794e.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4404124/normal_5fe6be5e13a94.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4423427/normal_60510bf86b3b3.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4415309/normal_5fcc1fc5b7a6b.pdfIn PDF document text
- https://dijafujuzu.weebly.com/uploads/1/3/4/3/134369935/xutivimej-nakisebo-nuduwitewi-kawumawizali.pdfIn PDF document text
- https://voxasofipazo.weebly.com/uploads/1/3/1/4/131407247/fisuwosemol-ponoponeb.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4379489/normal_60586f317bd1a.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4505839/normal_5fe3e44b774b5.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4478415/normal_60269bc22b6bd.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4378608/normal_6043edefa7978.pdfIn PDF document text
- https://kukonite.weebly.com/uploads/1/3/4/6/134611202/50723a46b8.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4384142/normal_5fcd302d05c31.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4501054/normal_603ccec67b79b.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4427295/normal_5fdfb8aeee84f.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4406191/normal_60138a69b8b67.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4408584/normal_60005db66f78f.pdfIn PDF document text
- http://www.ascendercorp.com/In PDF document text
- http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000eb74.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xEB74	5372 bytes
SHA-256: `835ad370d0d32839510fed63d2678e1082c618074893f7ea4ec58bbf81ea3556`
`font_01_sfnt_off0000fdb8.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xFDB8	15792 bytes
SHA-256: `c57c59751271f252d8be1879d9243cf1073f3fb8725b522d74a1da847f5619f1`
`font_02_sfnt_off00012eb6.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x12EB6	16312 bytes
SHA-256: `975089639afea594160f6daa1ae948ffc4125994d61a9fd32dce02580f7b6b15`

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