PDF malware analysis — malicious · 3eab7a119009970a

MALICIOUS

PDF

81.6 KB Created: 2021-09-10 17:58:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26

MD5: 50c21675133610599fcf6d4d37b81e02 SHA-1: b1852357b1ce0eb988a991aa2aff98c54492e31e SHA-256: 3eab7a119009970a4606b03b9db87e87d4917505ca25fea0b06316653ff13d1b

174 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The sample is a PDF document that contains embedded JavaScript and multiple external URIs, many of which are part of a link farm. The 'SE_PAYMENT_REDIRECT_LURE' heuristic indicates the document's content is designed to trick users into believing there are new or changed financial instructions, a common tactic in business email compromise attacks. The embedded JavaScript likely facilitates the redirection to malicious URLs.

Machine Learning

Nyx PDF Classifier malicious score 0.9981

Heuristics 7

ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
Payment redirection / bank-detail change lure high SE_PAYMENT_REDIRECT_LURE

Document describes new or changed bank, wire, ACH, IBAN, SWIFT, or routing instructions — a high-value business-email-compromise pattern
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.
Embedded JS stream low PDF_JS

PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
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://pistant.ru/uplcv?utm_term=set+the+time+on+my+phone+please PDF link annotation
- https://healthlantern.com/ckeditor/ckfinder/userfiles/files/63037381928.pdfIn PDF document text
- http://vipacademy.org/userfiles/file/wowawulemu.pdfIn PDF document text
- https://banerjeetourspecial.in/ckfinder/userfiles/files/fiwifuxajive.pdfIn PDF document text
- https://mudrun.com/home/mud/public_html/ckfinder/userfiles/files/futorupezopegamijosapim.pdfIn PDF document text
- https://candica.pl/ckfinder/userfiles/files/65022756493.pdfIn PDF document text
- http://thietbidienmpe.net/upload/files/tipozesalajemifal.pdfIn PDF document text
- http://tygodnikzuzlowy.pl/ckfinder/userfiles/files/47547344612.pdfIn PDF document text
- https://momsgardenfoods.com/ckfinder/userfiles/files/kasovepotivevixafabaled.pdfIn PDF document text
- http://naturallabs.de/userfiles/file/foxawexolo.pdfIn PDF document text
- http://gokea.org/upload/editor/files/93338313113.pdfIn PDF document text
- http://cistenivytahu.cz/upload/file/volevenezagizito.pdfIn PDF document text
- https://drddvichitra.com/userfiles/file/79673481339.pdfIn PDF document text
- http://tcsklife.com/filespath/files/20210907161529.pdfIn PDF document text
- https://xpress2.eu/ckfinder/userfiles/files/daninipejibep.pdfIn PDF document text
- https://autoradiator.mn/uploads/ckfinder/files/wezegugulerorivexi.pdfIn PDF document text
- http://dispensapertutti.com/userfiles/files/wotaxivigafenozopatixi.pdfIn PDF document text
- https://mahanakhon.pacedev.com/ckupload/files/xomigofuwudojusu.pdfIn PDF document text
- https://luxesystem.site/js/ckfinder/userfiles/files/20584347412.pdfIn PDF document text
- http://93564497.com/userfiles/fudulitenav.pdfIn PDF document text
- http://kozszemle.hu/uploads/files/72566584745.pdfIn PDF document text
- https://crossfitbeeshark.ro/app/webroot/files/userfiles/files/liwaziponodepenogovoze.pdfIn PDF document text
- http://sushistoryus.com/uploads/files/44768099311.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_off0000dd10.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xDD10	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off0000f527.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF527	10604 bytes
SHA-256: `6a01765b07da73f32b88389d9e6b7c4d2380bfd30be83055f6f3549dbbbc4dda`
`font_02_sfnt_off00010d36.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10D36	16768 bytes
SHA-256: `6aad75fc8f1555fa99729f736a5dd86f8d7c69398ffeba2a8fc558a149c58c1f`

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