PDF malware analysis — malicious · 0d490b1719541322

MALICIOUS

PDF

88.8 KB Created: 2021-09-05 13:04:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11

MD5: 80d1772150e68ee5be99faba1987f88a SHA-1: 2b5ec3b923ea52d38caf93e59186d7a0a26580f2 SHA-256: 0d490b1719541322bbea3dd216ea82b6b384e43826b501a5421387766600c0c7

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. It contains a link farm pointing to various compromised websites and disposable hosting, suggesting a phishing or malware distribution attempt. The ML classifier also strongly indicated maliciousness.

Machine Learning

Nyx PDF Classifier malicious score 0.9942

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
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://allytemp.ru/uplcv?utm_term=history+and+rules+of+basketball+pdf PDF link annotation
- https://newat.ru/wp-content/plugins/super-forms/uploads/php/files/5fad662907f65e410edf8564ff4df17f/6447342757.pdfIn PDF document text
- https://bravo-hk.com/userfiles/file/foxinilova.pdfIn PDF document text
- http://malagi.pl/user-files/fck/file/jepenibop.pdfIn PDF document text
- http://vanguardhungary.hu/userfiles/file/luzetituxulififoxujes.pdfIn PDF document text
- https://www.alertgy.com/wp-content/plugins/super-forms/uploads/php/files/d6dc63806faa50645e13b434376f6f46/gefejiz.pdfIn PDF document text
- http://dribblebar.pl/userfiles/file/daladezagaf.pdfIn PDF document text
- https://razredna-nastava.net/files/vizuvewosobetuneroxofaj.pdfIn PDF document text
- http://chemtron-vostok.ru/media/file/27223008911.pdfIn PDF document text
- http://lifestyleufa.ru/wp-content/plugins/super-forms/uploads/php/files/61be38f82390e137ef9d3be3f3983f96/55226932928.pdfIn PDF document text
- http://aihyang.com/userfiles/file/37117493729.pdfIn PDF document text
- http://www.kissdocs.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16071cdaf472e9---79663542471.pdfIn PDF document text
- https://isabellepieman.com/userfiles/file/lukozofes.pdfIn PDF document text
- https://c4ir.ae/wp-content/plugins/super-forms/uploads/php/files/n90g4qoed4a1tvi7s4evlk5qg2/besofeverogekabajaxoji.pdfIn PDF document text
- https://manhremhoangvan.com/wp-content/uploads/files/21235247259.pdfIn PDF document text
- https://odlingfamily.com/userfiles/file/34709978970.pdfIn PDF document text
- http://studiomuraca.eu/userfiles/files/66321761585.pdfIn PDF document text
- http://beccaro.it/userfiles/files/8584419464.pdfIn PDF document text
- http://absolutelyneon.com/userfiles/file/3732064917.pdfIn PDF document text
- http://fitnessklub-impuls.pl/uploads/assets/file/64259145242.pdfIn PDF document text
- http://abapaposentados.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16082d51a72394---79047745182.pdfIn PDF document text
- https://adikkedua.com/contents/files/mokevep.pdfIn PDF document text
- https://christembassyromford.org/wp-content/plugins/super-forms/uploads/php/files/5919eff9f8de4fe41f3658422e030173/lukawebaraw.pdfIn PDF document text
- https://ohligschlaeger-berger.de/wp-content/plugins/formcraft/file-upload/server/content/files/160725a688fc22---40028710245.pdfIn PDF document text
- http://www.theflightfest.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608819df4b4c6---84938950860.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_off0000f725.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF725	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off00010f37.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10F37	17492 bytes
SHA-256: `57e797ee29a072c60e08b186ca6295fc81a44d94d5217f5547325d7ec3bbe89d`
`font_02_sfnt_off00013c75.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x13C75	10928 bytes
SHA-256: `9797a095483be012926b60766dabf343728a2d5fdaa163bcfa21316e78072589`

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