PDF malware analysis — malicious · e0723088e79c2c37

MALICIOUS

PDF

71.3 KB Created: 2021-09-11 20:06:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16

MD5: 90944be72c73fe8bfe348a58eb9b2b15 SHA-1: 508f8f6bdb332c656959ffdcf0f2f22f36c106d5 SHA-256: e0723088e79c2c373258010cb085ae09a8ed8d26a9fc5b404e294345f89d27db

134 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous embedded URLs, many of which point to disposable domains and are part of a link farm, indicating a phishing or malware distribution attempt. The ClamAV detection and ML classifier strongly suggest malicious intent. While no scripts were directly extracted, the PDF structure and embedded links are indicative of a phishing lure designed to trick users into downloading further malicious content.

Machine Learning

Nyx PDF Classifier malicious score 0.9956

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 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.
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 http://songhakbbq.com/uploads/files/32226148923.pdf In PDF document text
- http://jerseybankruptcylaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/24435669221.pdfIn PDF document text
- https://3drm.bg/uploads/pictures/files/19087445032.pdfIn PDF document text
- https://btegypt.com/file/22101841799.pdfIn PDF document text
- https://aradovan.com/userfiles/file/vuzukawuvoripowuxivone.pdfIn PDF document text
- http://flyingwedge.com/uploads/assets/file/50198962902.pdfIn PDF document text
- http://tvoirostov.ru/ckfinder/userfiles/files/bomurimemofapurobim.pdfIn PDF document text
- http://rilta.net/userfiles/files/77484939244.pdfIn PDF document text
- https://jyapa.com/jhuoyue/uploadfiles/jisipabeximulizosa.pdfIn PDF document text
- http://24cvety.ru/upload/files/zinugokadokatixaveremizi.pdfIn PDF document text
- http://adhdesign.de/userContent/files/20210910011927-dabalabivigopezaxak.pdfIn PDF document text
- https://www.medipratik.com/wp-content/plugins/formcraft/file-upload/server/content/files/16138c0b02e9ba---70721927451.pdfIn PDF document text
- http://pyroglobal.sk/app/webroot/files/userfiles/files/26211249607.pdfIn PDF document text
- https://www.tunnel.de/files/uploaded/file/41511750150.pdfIn PDF document text
- http://interface-referencement.com/userfiles/file/vekitib.pdfIn PDF document text
- http://pozitron-s.ru/userfiles/file/puwija.pdfIn PDF document text
- http://anapro.com/ckfinder/userfiles/files/gawexolateb.pdfIn PDF document text
- https://www.pactforfamilies.org/ckfinder/userfiles/files/kinimuwuxilemenubej.pdfIn PDF document text
- http://wasserburg.pl/userfiles/file/zaratavidelojabotilizobow.pdfIn PDF document text
- https://haysalon.com/public_html/userfiles/file/rurezesitanatagerarutabeg.pdfIn PDF document text
- http://amadpich.com/userfiles/file/wufitemapo.pdfIn PDF document text
- http://dream-mebel.com/pic/file/kefuxesubekozogifuwoboten.pdfIn PDF document text
- https://chrmglobal.com/userfiles/file/65950469909.pdfIn PDF document text
- https://feedproxy.google.com/~r/Uplcv/~3/FevRqgeaUVY/uplcv?utm_term=turbo+racing+unlimited+moneyPDF link annotation
- 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://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_off0000b364.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xB364	10864 bytes
SHA-256: `81adeda8e58fa18663210d931d6e97674aad76c5c1310aa5ad4e53283c0efd09`
`font_01_sfnt_off0000cc49.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xCC49	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_02_sfnt_off0000e45b.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE45B	16876 bytes
SHA-256: `f03b60aca0b21c57720d4d2c92c9e885c0e244af2240aa20ffa705b2d5ed348c`

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