PDF malware analysis — malicious · ef291d5544b41469

MALICIOUS

PDF

104.8 KB Created: 2021-05-26 05:09:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22

MD5: e0280e510dec9308fa6c082aba664a00 SHA-1: 21ea571f17d25af5242cda13678ea8a5b6aa1e07 SHA-256: ef291d5544b414692cf8bd031465ac43bf0a8fc15719779f4f5889372fcee708

196 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 a password-protected-archive lure. 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 0.9985

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.
Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE

Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
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/strik?utm_term=rar+password+unlocker+mac+online PDF link annotation
- https://static.s123-cdn-static.com/uploads/4389127/normal_5ffb53b1a2d96.pdfIn PDF document text
- https://faniwavuguvupos.weebly.com/uploads/1/3/4/4/134478403/f4dc27.pdfIn PDF document text
- https://kegegizexuf.weebly.com/uploads/1/3/4/0/134042356/90a8478a04c517.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4376869/normal_6023f38222450.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4411489/normal_5fe008214ba14.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4459914/normal_6054b4388ac1d.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4385852/normal_5ff7a2a904081.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4464732/normal_6049d337b7764.pdfIn PDF document text
- https://nonegila.weebly.com/uploads/1/3/4/7/134702729/f778a0b14.pdfIn PDF document text
- https://pabarubuvu.weebly.com/uploads/1/3/1/3/131379718/vatavizavofufa-ketitolase-bosebekuwejit-nawaxozezitemax.pdfIn PDF document text
- http://www.ascendercorp.com/In PDF document text
- http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
- https://uploads.strikinglycdn.com/files/36daafe8-6517-4f49-90c1-a517bca644dc/60643278093.pdfIn PDF document text
- https://s3.amazonaws.com/farowug/63300513180.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/b314288e-4cee-4b98-8a21-f18f6e37569a/54199780676.pdfIn PDF document text
- https://s3.amazonaws.com/pajukovuxetu/edify_energy_annual_report.pdfIn PDF document text
- https://s3.amazonaws.com/jiguwuzobozobaz/vofurizazadelegobegizisud.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/69f6233c-a7db-42f7-b892-b8cb73524ba8/padi_rescue_diver_manual_deutsch.pdfIn PDF document text
- https://s3.amazonaws.com/jeworurowam/padma_purana_kannada.pdfIn PDF document text
- https://s3.amazonaws.com/midaguvimabof/pillars_of_eternity_2_character_build_guide.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/6962b542-d83a-4f06-9de5-7255d0d06ca8/how_to_set_diablo_2_resolution.pdfIn PDF document text
- https://s3.amazonaws.com/niporofez/is_the_outsiders_book_based_on_a_true_story.pdfIn PDF document text
- https://s3.amazonaws.com/ropidadegaxut/12016754510.pdfIn PDF document text
- https://s3.amazonaws.com/nedijowewoded/12277547354.pdfIn PDF document text
- https://s3.amazonaws.com/jinabom/crab_rave_piano_sheet.pdfIn PDF document text
- https://s3.amazonaws.com/varoximu/guide_des_tailles_cafe_coton_polo.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/d82be83f-fd33-41ed-9c11-1d77078b7a7c/can_my_lease_be_terminated_during_covid_19.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_off0000fa0c.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xFA0C	30992 bytes
SHA-256: `3dd61250dacd7c62cefaa93334828a7daa902a840f57568569ef8faa5569583f`
`font_01_sfnt_off000159f8.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x159F8	5384 bytes
SHA-256: `8e7fbb94a322e908e85beb0866c3bd2000c41b135d8c342c37dd73f075eb76dd`
`font_02_sfnt_off00016c46.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x16C46	11876 bytes
SHA-256: `3795d066b004d4d88fb4bd0caab41a2a4f787caa648c2cfaf5d430b02e8d35ea`

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