PDF malware analysis — malicious · 9ee4d27e63036146

MALICIOUS

PDF

77.3 KB Created: 2021-04-02 16:17:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21

MD5: ac1995bc1d384f48398e918f50139fc9 SHA-1: 905ccce8e8ba8c3dc7636857fdc74b71d3050581 SHA-256: 9ee4d27e630361466d56be825da742682e9ef86da28d9b893022211b63248498

186 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains a large number of external links, many pointing to disposable domains, suggesting a link farm used for phishing or distributing further malware. The embedded content, though heavily obfuscated, likely serves as a lure to these external resources.

Machine Learning

Nyx PDF Classifier malicious score 0.9998

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.
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://midufefew.ru/award?keyword=altman+z+score+model+pdf PDF link annotation
- http://pifofobexaxel.mypressonline.com/change_management_theories.pdfIn PDF document text
- http://votixibutiro.medianewsonline.com/vekazif.pdfIn PDF document text
- http://trastenmyqort.online/maryland_drivers_manual_spanishil4hy.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4496826/normal_603acc507dc82.pdfIn PDF document text
- http://copytoshka.ru/kudewuwedamimefirevidc90sv.pdfIn PDF document text
- http://asta-stroy.ru/paxusulakepuvirudizv41m.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4417988/normal_5fd7846233ae0.pdfIn PDF document text
- http://netopodimamo.mywebcommunity.org/is_mexican_medicine_better.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://3a0d5408-2ea1-4258-8d29-5d96341cad2c.filesusr.com/ugd/79cb75_4f2afe751abb492ea5b0e3a4117f2927.pdf?index=trueIn PDF document text
- https://a7193630-a032-4ee2-b136-33837135b76a.filesusr.com/ugd/fac845_0ada87594cd949c8968474c72bd31aa1.pdf?index=trueIn PDF document text
- https://s3.amazonaws.com/bejikefowu/malodofedesujuk.pdfIn PDF document text
- https://7980b0ff-2efe-48f4-a442-6c87bca80713.filesusr.com/ugd/9bd8c3_f888f35a8438456ba00e31ad2b9e21b7.pdf?index=trueIn PDF document text
- https://8650d040-a33d-467d-a608-6706f181f11b.filesusr.com/ugd/61b8bf_d83b6846c83b40069887b96836c389d6.pdf?index=trueIn PDF document text
- https://d52369c8-37f2-40d9-9d5f-d682b3b4a2e4.filesusr.com/ugd/6d5a7b_da220cb28b3142f6993ede749380ded3.pdf?index=trueIn PDF document text
- https://af0fe010-594a-4ec7-a26b-e2d78e33490d.filesusr.com/ugd/7d2910_4974683cfef348c286958fcdf2b71b5e.pdf?index=trueIn PDF document text
- https://s3.amazonaws.com/sajezife/nemakatanelolibokixeri.pdfIn PDF document text
- https://11ca5eb4-0abe-4d5d-8073-3f36f6088e80.filesusr.com/ugd/8b62d8_028732b28f79437985c979fb61ef1515.pdf?index=trueIn PDF document text
- https://97a45c9e-1ab5-462a-bfe2-fded34b9a8b9.filesusr.com/ugd/b50c55_d227ff8331144d9b83db819141774d97.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000dfae.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xDFAE	5080 bytes
SHA-256: `08356482ffd044bc9022c3eae43807aacd21ab35bbd83d9ee4677795065e0354`
`font_01_sfnt_off0000f0d2.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF0D2	11796 bytes
SHA-256: `a92e59bcdf268981f851ebb91ec08b4ab508ab2e4c3a36c7e6c73f4a23ac94b4`
`font_02_sfnt_off00011875.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x11875	4324 bytes
SHA-256: `a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f`

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