PDF malware analysis — malicious · 3718f06b2a5c8ce8

MALICIOUS

PDF

69.5 KB Created: 2021-09-25 22:12:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23

MD5: 00c213181c3952c2856eba3f894d8da1 SHA-1: 365da4049b7277860ee56bb25817d14efe16ace6 SHA-256: 3718f06b2a5c8ce82c6833558264ea2903d4aa7498fba3b7a316a93e9629a15a

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 part of a link farm on disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware via the embedded links.

Machine Learning

Nyx PDF Classifier malicious score 0.9947

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://krisoc.ru/uplcv?utm_term=genshin+impact+android+not+compatible PDF link annotation
- https://zagi.hr/files/ravaxazuw.pdfIn PDF document text
- http://www.halpellet.hu/userfiles/files/51529284312.pdfIn PDF document text
- https://morganmethod.tuesdaytrader.com/ci/userfiles/files/56291696037.pdfIn PDF document text
- http://bernardthevenet.fr/ckfinder/userfiles/files/84941706686.pdfIn PDF document text
- https://kapefashion.com/files/files/87168688778.pdfIn PDF document text
- http://dangkykinhdoanhkiengiang.com/upload/ck/files/movomude.pdfIn PDF document text
- http://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/1613357f3caf40---73748704717.pdfIn PDF document text
- http://mtecommerce.it/public/news/file/64815480881.pdfIn PDF document text
- http://darslaska.org/ckfinder/userfiles/files/bufimugidomotobin.pdfIn PDF document text
- http://www.fliesen-brill.de/wp-content/plugins/formcraft/file-upload/server/content/files/16132c2ea9c97f---sozadewifasiwijapuzej.pdfIn PDF document text
- http://nesemlak.com/test/images/uploads/files/wurimaverazikava.pdfIn PDF document text
- http://anchor-m.com/js/upload/files/52927573055.pdfIn PDF document text
- https://belitour.ir/basefile/belitourir/files/mexefozemi.pdfIn PDF document text
- http://malopolskiszlakwinny.pl/upload/File/rojefuvezigufozavep.pdfIn PDF document text
- http://hawaii-resort.info/images/blog/file/gamavad.pdfIn PDF document text
- http://billagelaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/wukuxezetugobituw.pdfIn PDF document text
- https://euroialinsol.ro/userfiles/file/56602052410.pdfIn PDF document text
- http://pincesorvarshop.hu/editor_up/tigekexolixudojogimo.pdfIn PDF document text
- http://walosports.cl/userfiles/file/pesebugitejofuzunoziv.pdfIn PDF document text
- http://rejs2013.cycling-recycling.eu/imgturysta/files/zuvazozizufemigit.pdfIn PDF document text
- https://florerialafloresta.com/ckfinder/userfiles/files/83243213882.pdfIn PDF document text
- http://titibbs.xyz/js/ckfinder/userfiles/files/49834630173.pdfIn PDF document text
- http://portalinmobiliario24.com/uploades/fckeditorfile/manonuvovanegazisepemas.pdfIn PDF document text
- http://hrjok.com/uploadfile/file/lomuwotowegepavep.pdfIn PDF document text
- http://brkvinc.com/userfiles/file/lujugo.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_off0000b04d.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xB04D	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off0000c864.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xC864	10960 bytes
SHA-256: `727a188460de9fe83efe89db23a5d7b67b5caf85f9c8bbd9303aba38540721ef`
`font_02_sfnt_off0000e15c.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE15C	15556 bytes
SHA-256: `14e94c21bc14e515f9b2ef609275e505451899eb7c69f12b2b79c9c369b3878e`

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