PDF malware analysis — malicious · 60031beb8e844719

MALICIOUS

PDF

81.4 KB Created: 2021-09-23 11:30:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23

MD5: 7a5ae7d0fad7f07efae4c6677f4ee50a SHA-1: 2a02cd9296fa2c87ce1bf988c024821144cc1802 SHA-256: 60031beb8e844719a279e01c8ded6712dd683909854043318eeeef431c119f16

124 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF file was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. The presence of numerous external URLs, many pointing to disposable hosting and employing UTM parameters, suggests a link farm designed to redirect users. The document body is heavily obfuscated, preventing a clear understanding of its direct content, but the overall structure and URL distribution strongly indicate a phishing or malware distribution campaign.

Machine Learning

Nyx PDF Classifier malicious score 0.9137

Heuristics 4

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 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
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://irlanc.ru/uplcv?utm_term=how+to+connect+android+phone+to+pc+without+usb PDF link annotation
- https://clubesolbra.com/uploads/files/46527567171.pdfIn PDF document text
- http://www.jfac.kr/ckfinder/userfiles/files/38530995060.pdfIn PDF document text
- http://sentai.cc/data/file/20210905_050805_113.pdfIn PDF document text
- http://zzquansu.cn/d/files/14227734349.pdfIn PDF document text
- http://naszemotyle.natura2000.pl/imgturysta/files/lilodavifipapobuje.pdfIn PDF document text
- http://ppfi-online.com/userfiles/file/suvuxog.pdfIn PDF document text
- https://bunyaminerdemir.com/resimler/files/romemibepujubeledutaloba.pdfIn PDF document text
- http://www.slappedtogether.com/editoruploadfiles/file/80619055924.pdfIn PDF document text
- http://4rrecycle.com/files/file/mulodomegakod.pdfIn PDF document text
- https://artsketch.ru/wp-content/plugins/super-forms/uploads/php/files/e14c7f0dbb9dae66b856f9263a2d1afa/kuboguketujofixapi.pdfIn PDF document text
- https://highfieldhousehotel.net/nbloom/fckuploads/file/96683409766.pdfIn PDF document text
- https://ebal.ro/app/webroot/files/userfiles/files/lelusowizodarabisukubusi.pdfIn PDF document text
- http://hastensandbreakfast.nl/userfiles/file/xotasiwidexunenutukaj.pdfIn PDF document text
- https://0900107678.com/upload/file/susuwijupodufamunamo.pdfIn PDF document text
- http://goang-hann.com/uploads/files/202109162358141134.pdfIn PDF document text
- http://www.skupp.pl/wp-content/plugins/formcraft/file-upload/server/content/files/16141eefdc2401---26401412182.pdfIn PDF document text
- http://sys-svinding.dk/userfiles/file/tojizatowex.pdfIn PDF document text
- http://mtsp.by/userfiles/files/gowimujenuburuj.pdfIn PDF document text
- http://caramelitos.sk/files/67283440069.pdfIn PDF document text
- http://chongthamnguoc.vn/img/files/vasobenoxadiresopaw.pdfIn PDF document text
- http://sarljarry.fr/userfiles/file/32518498244.pdfIn PDF document text
- http://prospekt-rostov.ru/ckfinder/userfiles/files/59466079325.pdfIn PDF document text
- http://nyitotthetvege.kastelyszallodak.hu/userfiles/files/matef.pdfIn 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_off0000e1d3.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE1D3	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off0000f9ea.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF9EA	10884 bytes
SHA-256: `f3cd5e891903a12519bd7daf31ab18bdb14592d71265c883f1b569bcf4d03fba`
`font_02_sfnt_off000112c5.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x112C5	17804 bytes
SHA-256: `788e12b3d8ee6030d787ce9dd885eea93e7d21fad2633a5eb79b27cf583733c6`

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