PDF malware analysis — malicious · d9d121664e4b1283

MALICIOUS

PDF

70.1 KB Created: 2021-09-25 02:14:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16

MD5: 561b262955a985c08e29b094c0752d64 SHA-1: d8f6fc7332cacf03012d4dbe1dc26af66ffa5cfe SHA-256: d9d121664e4b1283d3446058fbb81093ef27c6ebbc5b35dfae81c251f676dd53

126 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, many of which are hosted on domains that appear to be part of a link farm, a common tactic for distributing malicious content or conducting phishing campaigns. The PDF_SEO_DISPOSABLE_LINK_FARM heuristic further supports this, indicating a large number of distinct hosts with few links per host. No scripts were extracted, but the structure and heuristics strongly suggest a phishing or malware distribution attempt.

Machine Learning

Nyx PDF Classifier malicious score 0.9975

Heuristics 5

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
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://lean-ds.com/upload/editor/file/82914848664.pdf In PDF document text
- http://erkerlaender.de/wp-content/plugins/formcraft/file-upload/server/content/files/1613fbd7783eec---bolobokadetidebum.pdfIn PDF document text
- https://ltssinternational.com/res/wysiwyg/file/nirovoxavetibapidonema.pdfIn PDF document text
- http://synthecinter.com/userfiles/files/62271226991.pdfIn PDF document text
- http://stefani.cz/fck/file/94777278268.pdfIn PDF document text
- http://festacreativita.org/userfiles/file/migedivasumizutesunirekiz.pdfIn PDF document text
- https://binhvi.com/upload/files/zenutosen.pdfIn PDF document text
- https://glycocalyx.nl/userfiles/image/file/sareme.pdfIn PDF document text
- https://businesslife.com/content/files/50460735220.pdfIn PDF document text
- https://shreenathtechnologies.com/userfiles/file/91454602596.pdfIn PDF document text
- http://auburn-properties.com/userfiles/files/fiwal.pdfIn PDF document text
- https://lacaune.hu/userfiles/file/jozekoroladigevak.pdfIn PDF document text
- http://zatoodesign.com/userfiles/files/wawatodupemilep.pdfIn PDF document text
- http://5thaveseniors.org/userfiles/file/filifuxamekonugex.pdfIn PDF document text
- http://karaokejdi.com/ckfinder/core/connector/php/upload/files/70191323079.pdfIn PDF document text
- http://dzstock.com/Upfiles/file/vaxizatixudulixe.pdfIn PDF document text
- http://baovevietnam-vnss.com/upload/file/pozipifawumuselafojasitaj.pdfIn PDF document text
- http://cjmfgx.morefriendship.com/upload/files/witenawunufarufekuka.pdfIn PDF document text
- http://www.rafaellucenaehijos.com/ckfinder/userfiles/files/nofiwug.pdfIn PDF document text
- http://business-plan-capalpha.fr/mbp/upload/images/images/upload/ckfinder/1412573700.pdfIn PDF document text
- http://autoklej.pl/app/webroot/media/files/60475429791.pdfIn PDF document text
- http://dogable.de/userfiles/file/70986089925.pdfIn PDF document text
- http://furkansigorta.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/16140613fcf6fe---12274639061.pdfIn PDF document text
- https://fotojursa.cz/userfiles/file/batigakaboridiw.pdfIn PDF document text
- https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/6naE_Nh8_CY/uplcv?utm_term=oxygen+os+apps+for+any+androidPDF 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_off0000b2be.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xB2BE	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off0000cad5.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xCAD5	10772 bytes
SHA-256: `3fddadbcce5144cdb238410f881fe30c4572b253df32d329757458aa52114b4e`
`font_02_sfnt_off0000e392.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE392	15544 bytes
SHA-256: `3e73652c0ed7320d901532d30f117ea2890020c0456fd27b8f931d70b45a9842`

Open this report in the interactive analyzer, or submit your own file for analysis.