PDF malware analysis — malicious · 956003d554630eec

MALICIOUS

PDF

78.0 KB Created: 2021-09-10 02:53:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14

MD5: 33486fd81f2fe992e271cbe638a5e81d SHA-1: dc7bc67335a7f2233c9d9539521f53adffd12c1b SHA-256: 956003d554630eec4235f0c4d60cd570295d54b9b6a198109e9b1ef3afdb1fe5

126 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, with one heuristic identifying it as a link farm on disposable hosting. The primary purpose appears to be directing users to a network of sites that host further malicious PDF files.

Machine Learning

Nyx PDF Classifier malicious score 0.9955

Heuristics 5

ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
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 http://aasghsflqsae.handylover.com/upload/files/fevowixof.pdf In PDF document text
- https://soportedevida.mx/ckfinder/userfiles/files/tufosapuxusorinavuritoduw.pdfIn PDF document text
- https://www.channeloflove.com/ckfinder/userfiles/files/pamibivaxojut.pdfIn PDF document text
- http://www.annaleehuber.com/content_files/file/75677980538.pdfIn PDF document text
- http://stavo-bazar.cz/userfiles/file/74338780979.pdfIn PDF document text
- https://mebelihome.ru/upload_picture/kafadudofosibovoxasotivam.pdfIn PDF document text
- https://webshopplus.nl/app/webroot/files/userfiles/files/dowagavepisejetobonejib.pdfIn PDF document text
- https://kfk-dekoration.dk/images/uploadedimages/file/85110663812.pdfIn PDF document text
- https://shinko-tw.com/UserFiles/file/lopidefasewikanaruvej.pdfIn PDF document text
- http://mynotary.ca/sites/all/sites/mynotary.ca/files/73405653798.pdfIn PDF document text
- https://www.poolsrus.com.au/application/third_party/ckfinder/userfiles/files/wejawikizonevajefipi.pdfIn PDF document text
- http://perfect-gallery.com/userfiles/file/64050694326.pdfIn PDF document text
- http://statsale.com/data/upload/ck/files/fawojijonexowevive.pdfIn PDF document text
- http://xn--h1acbpobggs.xn--p1ai/data/files/rofudefikuroponevupuna.pdfIn PDF document text
- http://forti.in/userfiles/file/keletemapul.pdfIn PDF document text
- http://bizwd.com/wp-content/plugins/formcraft/file-upload/server/content/files/16133fc64ab596---48004569800.pdfIn PDF document text
- https://mosaicopeoplecorporation.com/ckfinder/userfiles/files/wifefinotenusuxubujusirek.pdfIn PDF document text
- https://euronuts2009.ge/files/files/sifelozabisavulo.pdfIn PDF document text
- http://mgtofubbq.com/uploads/files/minub.pdfIn PDF document text
- http://sochisushi.nl/survey/userfiles/files/9017204319.pdfIn PDF document text
- https://senzedigicraft.com/wp-content/plugins/super-forms/uploads/php/files/9890591c4ce7ea62a5f079069f78cd14/12909476953.pdfIn PDF document text
- https://ssekolkata.com/ckfinder/userfiles/files/23697852407.pdfIn PDF document text
- http://mintaialuminum.com/d/files/13782180137.pdfIn PDF document text
- http://futuralagoparking.eu/userfiles/files/97480953783.pdfIn PDF document text
- https://feedproxy.google.com/~r/Uplcv/~3/BvfzZFkJO3s/uplcv?utm_term=asphalt+xtreme+downloadPDF 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 4

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000b5b8.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xB5B8	10732 bytes
SHA-256: `8a2460bdf22b049ae1cbbe49970eb8dd5451fa7e76a709e838b53571e44b3de8`
`font_01_sfnt_off0000ce56.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xCE56	16148 bytes
SHA-256: `b17e3c388ca520c70044df51a505a8c8de3d1ca9b2e495c629779bc8d31aca59`
`font_02_sfnt_off0000e3e5.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE3E5	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_03_sfnt_off0000fbf7.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xFBF7	18444 bytes
SHA-256: `7cebc7c9ee61eeeac5d69e752551fcd19a1fc758fd78af5c9a4cbb55918e1967`

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