Malicious PDF — malware analysis report

Static analysis result for SHA-256 6b762377b577b589…

MALICIOUS

PDF

69.7 KB Created: 2021-09-12 05:02:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: ea3216ad02eb1e5e4046a3434f3b039d SHA-1: f0433a2fc2b37a365ef3ba2111ab0a4b8eaf28c4 SHA-256: 6b762377b577b5892f45b7e198fc256c2a5f1602c8f3042f2bfbceda51345727
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, many of which point to other PDF files hosted on various domains, suggesting a link farm or distribution network. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' strongly indicates this malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9849

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
  • 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
  • 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://fruhmann-elektrotechnik.at/limufekanurepato.pdf
    • https://n-v-v.dk/userfiles/file/nofanefiraxozoti.pdf
    • https://shastriratanchatterjee.com/ckfinder/userfiles/files/69469774949.pdf
    • http://angelofthewinds.org/ckfinder/userfiles/files/mumulegem.pdf
    • http://2446665a.ru/ckfinder/userfiles/files/30724799017.pdf
    • https://rtvpuls.com/ckfinder/userfiles/files/zakolexip.pdf
    • https://jpt.mysmartedu.com/uploadimages/files/buvirafojezatiz.pdf
    • https://comfort8889.com/upload/files/kisurapokazesikixube.pdf
    • https://trompis-tondschungel.de/userfiles/file/wufawirutazeri.pdf
    • http://przystaneknida.pl/data/aktualnosci_imgs/file/zonuwugutun.pdf
    • http://wabasnb.com/files/fckeditor/file/1261761322613cd9e2c8013.pdf
    • https://aordonez.com/images/contenidos/files/13634747910.pdf
    • http://motopujcovnateplice.cz/userfiles/file/vekir.pdf
    • http://eternoohydro.com/d/files/93294953388.pdf
    • https://humanistbeauty.com/wp-content/plugins/super-forms/uploads/php/files/3osnm17u05urjpgpicv3o1dkt5/pabimanalexajapexixesifag.pdf
    • http://de-ko-gmbh.com/ckfinder/userfiles/files/3985061543.pdf
    • http://supermarketdv.ru/files/file/nemut.pdf
    • https://sunkamalzemecilik.com/userfiles/file/35504098275.pdf
    • http://www.yeosung21.or.kr/ckfinder/userfiles/files/1631193085.pdf
    • https://www.naabelectric.com/userfiles/files/44577014999.pdf
    • http://meble-tk.pl/userfiles/file/38908766750.pdf
    • http://finalbrand.cz/upload/file/72777608168.pdf
    • https://www.lowdoc-loans.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1612ea8fe2b358---82415653800.pdf
    • http://bakoca.hu/files/file/xumogixez.pdf
    • https://shinaltd.ru/images/file/28946936824.pdf
    • http://oreoltour.ru/sites/default/files/file/68845376804.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3CAf4wW3hvY/uplcv?utm_term=farming+pro+3+mod+apk+unlimited+money+download
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000af94.bin
226b34b967559f86792c6fc568d1c0664b8e1b92a999abc55f53f05bcea669d5		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAF94 11108 bytes
font_01_sfnt_off0000c948.bin
6225ef52411aab42aea723b2c55ba8e68c5deb6775ce46d67627bcecc074cdd6		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC948 15124 bytes
font_02_sfnt_off0000eeb5.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEEB5 16792 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.