PDF malware analysis — malicious · 57f143c58d738754

MALICIOUS

PDF

78.4 KB Created: 2021-09-19 20:48:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25

MD5: 25af5ebabf43ab8987414b5a0414d38c SHA-1: a07bef8eb6a9c3c4bb159a1731c93d4e961c5cc2 SHA-256: 57f143c58d73875443bf9282475eb786e700656b17618dbb2a92c2812ad5b717

146 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The file is identified as a malicious PDF by ClamAV and an ML classifier. It contains numerous embedded URLs, many of which point to potentially malicious domains, and exhibits characteristics of a link farm designed to obscure the true destination. The heuristic 'SE_QR_LURE' suggests the document may instruct users to scan a QR code, a common tactic in phishing campaigns.

Machine Learning

Nyx PDF Classifier malicious score 0.9975

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
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.
QR-code redirect lure medium SE_QR_LURE

Document instructs the user to scan a QR code with a phone — consistent with QR phishing, but also common in legitimate documents
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://boilerservis.ru/uploads/files/6925256733.pdf In PDF document text
- https://artdecor24.pl/uploads/files/85397619482.pdfIn PDF document text
- http://friulanapanini.com/images/file/59317787301.pdfIn PDF document text
- http://abwingscolley.com/uploads/files/gozun.pdfIn PDF document text
- http://cephedanismani.com/images/pages/file/gilexadiloboniguguni.pdfIn PDF document text
- https://chowdhurytourism.com/ckfinder/userfiles/files/14111414721.pdfIn PDF document text
- https://libyamonitor.com/sites/all/libraries/ckfinder/userfiles/files/46824758501.pdfIn PDF document text
- http://dishandspoonproductions.com/ckfinder/userfiles/files/beguzafilakonevofopogagun.pdfIn PDF document text
- https://ietc-oman.com/userfiles/files/41285068226.pdfIn PDF document text
- https://tarzminder.com/resimler/files/xegomupobuviwiwe.pdfIn PDF document text
- https://mut-zur-veraenderung-hambuch.de/userfiles/file/vivatejimesurobesoz.pdfIn PDF document text
- http://cn-daomeng.com/upload/userfiles/files/fb11ab203345fab6a20f4f1df65622dc.pdfIn PDF document text
- http://hflbdq.com/uploads/file/130048292030.pdfIn PDF document text
- http://poexali.org/static/image/_u/system/files/nolakiboreto.pdfIn PDF document text
- http://gartenstadt-apotheke.com/userfiles/file/muzuduvipifowibugixibukap.pdfIn PDF document text
- http://dkyangmei.com/uploadfile/file/2021091709170073499.pdfIn PDF document text
- https://stealthwindow.tw/uploads/files/202109111901096058.pdfIn PDF document text
- http://bainihu.com/upfiles/editor/files/29007719192.pdfIn PDF document text
- http://djarkitek.com/temp/vinney/HTML/userfiles/file/49682712617.pdfIn PDF document text
- http://hzaidele.com/images/upload/File/25096627861.pdfIn PDF document text
- http://deforma.it/userfiles/files/88675539010.pdfIn PDF document text
- http://banghetretunhien.com/media/ftp/file/4154134272.pdfIn PDF document text
- http://vxclouds.com/userfiles/file/47543332613.pdfIn PDF document text
- https://www.chortho.co.uk/wp-content/plugins/super-forms/uploads/php/files/el32ekbgbmufrft520eocs1g5e/farepazekamo.pdfIn PDF document text
- https://thefencedocumentary.com/adminfiles/file/litamubusibobunuduxenuwe.pdfIn PDF document text
- https://feedproxy.google.com/~r/Uplcv/~3/A3Ryygt5BCM/uplcv?utm_term=how+to+scan+qr+code+wifi+iphonePDF 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_off0000ccf3.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xCCF3	17556 bytes
SHA-256: `622f16b2a23475696551818f64b475e0cafc62ae0704e0ea28f9fff905194e7d`
`font_01_sfnt_off0000fa8f.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xFA8F	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_02_sfnt_off000112a6.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x112A6	10896 bytes
SHA-256: `9b8204500d40e03ebe538596f9237b13937ba7a74bd118a61a7b7e2f5f6b7201`

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