PDF malware analysis — malicious · d82fad49f28041b3

MALICIOUS

PDF

64.2 KB Created: 2021-10-03 08:28:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-20

MD5: ab9ee941acfc49b6896700991abf10d9 SHA-1: 37cb7bf029717627835e3b7358d0d33ea2f1c997 SHA-256: d82fad49f28041b355a05db640c7d157613c6d30fd44d88f698cda6c1c36c237

144 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF is identified as a phishing lure due to its small size and image-only content, typical of a screenshot designed to hide clickable links. It contains numerous embedded URLs, many pointing to disposable domains, suggesting a link farm or redirection scheme. The ClamAV detection and ML classifier further support its malicious nature, likely serving as a delivery mechanism for further malicious content.

Machine Learning

Nyx PDF Classifier malicious score 0.7407

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
Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE

PDF has 1 image(s), only 0 text block(s), carries a click-outward action, and is only 64 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
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
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://apz-arte.com/ckfinder/userfiles/files/fawoxanegafu.pdf In PDF document text
- http://mimarathi.live/assets/ckfinder/core/connector/php/uploads/files/rerepirovukanamig.pdfIn PDF document text
- http://hbisan.com/userfiles/file/43337935227.pdfIn PDF document text
- https://termofriz.rs/files/nawexosixexegaxarapu.pdfIn PDF document text
- http://tajesink.com/Uploadfiles/files/91575315226.pdfIn PDF document text
- https://imagebrandstudio.com/userfiles/file/96987863832.pdfIn PDF document text
- http://www.farmaciapenil.es/userfiles/files/71857040832.pdfIn PDF document text
- http://mmckno2010.zkosuchdol.info/files/gamilabaz.pdfIn PDF document text
- http://xn----9sbkvfu2aex3d.xn--p1ai/ckfinder/userfiles/files/27872852875.pdfIn PDF document text
- https://lixtech.com.tw/ckfinder/ckfiles/files/zimosojefajalakozewef.pdfIn PDF document text
- http://nanoscopy.ru/uploads/files/56498529232.pdfIn PDF document text
- http://columb-sklep.pl/userfiles/file/33933084657.pdfIn PDF document text
- https://www.allterra.group/wp-content/plugins/super-forms/uploads/php/files/cf320ee66fe912104f5d2d5d2044793a/fenukab.pdfIn PDF document text
- https://arichaindia.com/userfiles/file/lipudorifa.pdfIn PDF document text
- https://ngenadmin2.nextgenphotosolutions-beta.com/app/webroot/files/file/luvelulozobi.pdfIn PDF document text
- https://vickers-electronics.co.uk/wp-content/plugins/super-forms/uploads/php/files/8eeafe271a1b733968115979e22a9231/toxakevonegibulasurame.pdfIn PDF document text
- http://brickchamber.com/ckfinder/userfiles/files/84784156233.pdfIn PDF document text
- https://eksiliotomotiv.com/upload/ckfinder/files/zefewuxesoxozun.pdfIn PDF document text
- https://ln80.cn/filespath/files/20211001215050.pdfIn PDF document text
- http://www.gieskestukadoors.nl/ckfinder/files/files/faloterusodo.pdfIn PDF document text
- https://www.newhorizonscrisiscenter.org/ckfinder/userfiles/files/jusapenutuf.pdfIn PDF document text
- https://aprilboya.com/userfiles/file/mitiko.pdfIn PDF document text
- http://mapect.com/upload/fckeditor/file/12600777272.pdfIn PDF document text
- http://efeteknikyapi.com/userfiles/files/68302670005.pdfIn PDF document text
- http://stluciachamber.org/uploadedImages/contentImg/file/20370835082.pdfIn PDF document text
- https://feedproxy.google.com/~r/skout/mBVl/~3/DOqCt-cVA4I/uplcv?utm_term=minecraft+mod+android+1PDF link annotation
- 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_off0000b183.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xB183	14180 bytes
SHA-256: `a51f13e1876abe7f3c9746b74e3a70c455cf9f7518a70d69abb03b9d977096bf`
`font_01_sfnt_off0000d4ce.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xD4CE	10468 bytes
SHA-256: `b3fb354e51d70132b63a7f8d03bcb72bfecdd5f5049f0d7e34ddea71d4eb1efc`
`font_02_sfnt_off0000ec9d.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xEC9D	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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