PDF malware analysis — malicious · abd80afba73b1eae

MALICIOUS

PDF

70.2 KB Created: 2021-09-28 17:06:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26

MD5: 66393315191ed36294b742df4b7714ea SHA-1: 3ff3404dc626abfed41f6b848b776d89c2d0873a SHA-256: abd80afba73b1eaee94cc7c1a8e453b9ce5c4dd7e91d91721c01683ac6a7e2d4

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

This PDF document was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, many pointing to compromised CMS upload directories or disposable hosting, suggesting a link farm designed to redirect users to malicious sites. The presence of these links and the overall detection indicate an attempt to deliver a malicious payload or phish for credentials.

Machine Learning

Nyx PDF Classifier malicious score 0.9954

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
PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM

PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
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://smidgel.ru/uplcv?utm_term=deathrun+race+fortnite PDF link annotation
- https://legacydockandmarine.com/wp-content/plugins/super-forms/uploads/php/files/fb29b188b06dc91f472af2fc2267f9a7/bepel.pdfIn PDF document text
- https://www.agencesramos.com/ckfinder/userfiles/files/xelirotol.pdfIn PDF document text
- http://www.lifestaralberta.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612f48d1cbc39---wuluwuloravudewukana.pdfIn PDF document text
- https://cdmsig2.com/ckfinder/userfiles/files/18733776122.pdfIn PDF document text
- http://f-kcc.jp/user_data/userfiles/files/getegi.pdfIn PDF document text
- https://f1com.ge/wp-content/plugins/super-forms/uploads/php/files/ef1f490eef24635a3b48af6e3d0c3a3e/81937404243.pdfIn PDF document text
- https://amrapalispot.com/userfiles/file/labazubawopi.pdfIn PDF document text
- https://fnb-concepts.com/images/uploads/files/bixekotirifafin.pdfIn PDF document text
- http://www.cpiequipos.com/assets/images/user_files/files/kuxugi.pdfIn PDF document text
- http://ecohort.com/userfiles/files/xupiguj.pdfIn PDF document text
- https://chokysitohang.com/Uploads/userfiles/files/8415064390.pdfIn PDF document text
- http://fredericjean.net/oplusco/file/lisuvowugefobanugunalaju.pdfIn PDF document text
- http://tuvantindat.com/uploads/2021-09-27/images/files/71220376852.pdfIn PDF document text
- https://kanalprofi.at/UserFiles/file/51405946493.pdfIn PDF document text
- http://nasledie-sluck.by/var/upload/file/88806595393.pdfIn PDF document text
- http://otevrel.eu/ckfinder/userfiles/files/97329419606.pdfIn PDF document text
- http://alsace.annuaire-regional.com/ckfinder/userfiles/files/88203168549.pdfIn PDF document text
- http://amwordpress.org/wp-content/plugins/formcraft/file-upload/server/content/files/161355449ab918---78645932811.pdfIn PDF document text
- https://bu8m3tas68s-b1.com/contents/files/rakebutawimagasep.pdfIn PDF document text
- https://manajrgvaaradhi.com/cms-uploads/files/pimaketubotafukisil.pdfIn PDF document text
- https://ewdel.cz/ckfinder/userfiles/files/96031881366.pdfIn PDF document text
- https://beytarimcilik.com/admin/editor_resim/file/babopera.pdfIn PDF document text
- http://mpu-beratung-brendle.de/userfiles/file/4723247116.pdfIn PDF document text
- http://fatimaartwork.com/userfiles/file/zadigebepinabopagun.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://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_off0000b081.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xB081	16460 bytes
SHA-256: `c69511587f4ae649b92e0d774b99a103f53af8d8f271ac6fcdfc09728c63b8b6`
`font_01_sfnt_off0000da7d.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xDA7D	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_02_sfnt_off0000f294.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF294	10320 bytes
SHA-256: `33b1074758296925d0259f995ab2b7909fef58f6fed5604b4e378a2f12690b3b`

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