PDF malware analysis — malicious · 3d1ea7fc9be7e369

MALICIOUS

PDF

76.8 KB Created: 2021-09-14 04:02:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11

MD5: c2d6ee141b3b862e9260ffa04a210198 SHA-1: e1982c60ab239c3f08426d1a12290f80adb838b7 SHA-256: 3d1ea7fc9be7e3696f68e246c7c5b39376a1fe6766875a0816de3535ff777f9a

134 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and a high number of external URIs, many of which are hosted on disposable domains, indicating a link farm designed to redirect users to malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware delivery.

Machine Learning

Nyx PDF Classifier malicious score 0.9948

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.
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://allytemp.ru/uplcv?utm_term=access+the+cloud+from+android PDF link annotation
- http://mjacz.cz/soubory/files/kolekixowed.pdfIn PDF document text
- http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/1613feb2fb4fe0---46179032877.pdfIn PDF document text
- https://hunde-katzen.at/soubory/5558014053.pdfIn PDF document text
- http://helderlive.nl/ckfinder/userfiles/files/58892087254.pdfIn PDF document text
- http://archissimo.eu/userfiles/files/bujemorukabejipewewef.pdfIn PDF document text
- https://koltoztetes-szallitas-lomtalanitas.com/ckfinder/userfiles/files/35552978223.pdfIn PDF document text
- http://csc0311.com/userfiles/file/20210901183637_alo1ag.pdfIn PDF document text
- http://chemicalengineers.ie/images/milegalosoledotawizitejik.pdfIn PDF document text
- http://hzkontejnery.cz/ckfinder/userfiles/files/ledisepipiwitegonaxid.pdfIn PDF document text
- https://rallstarawards.us/nbloom/fckuploads/file/rozurepenawabomuseni.pdfIn PDF document text
- https://wineart.online/userfiles/file/64820576173.pdfIn PDF document text
- http://modern-pro.ru/files/file/garopifurisarafako.pdfIn PDF document text
- https://thanaclusterwestgate.leaddeehub.com/userfiles/files/zukesotujotug.pdfIn PDF document text
- http://egitara.com/upfiles/files/jisudubibapeganiv.pdfIn PDF document text
- http://faithleader.org/js/ckfinder/userfiles/files/52569067599.pdfIn PDF document text
- http://logo4you.dk/userfiles/file/wetikitesibesemo.pdfIn PDF document text
- https://floridainvestment.cz/files/file/67178041835.pdfIn PDF document text
- https://neurondevelopment.org/userfiles/file/5335833037.pdfIn PDF document text
- https://www.peltonfell.org.uk/ckfinder/userfiles/files/90670224816.pdfIn PDF document text
- https://ltes2.tw-goods.com/UserFiles/files/pavomevogozolaniwu.pdfIn PDF document text
- http://anhbanglaw.com/userfiles/file/71723890020.pdfIn PDF document text
- http://cbcom.fr/ressource/site-image/files/detawexijomofonepol.pdfIn PDF document text
- http://pnktools-th.org/ckfinder/userfiles/files/kogasafegutomazudova.pdfIn PDF document text
- http://www.ecvbrass.ch/user/web/file/bexulovafedal.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_off0000c863.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xC863	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off0000e07a.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE07A	10824 bytes
SHA-256: `6bbaced41d058bf6fe484c91a3bb5ab96f74b9c29146ef92fc56a9e5a10c715a`
`font_02_sfnt_off0000f945.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF945	17128 bytes
SHA-256: `a78b1c3bbe9f3d2fc5518b91c2a7a199909d858c1b68cb3386fc81c14c724f92`

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