Malicious PDF — malware analysis report

Static analysis result for SHA-256 f8e7dc6bae629579…

MALICIOUS

PDF

93.7 KB Created: 2021-06-28 10:21:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 15215113e5d6555fe772f5532134f1ce SHA-1: e8dec92c77e464d1cb74f9b9d87a6bf04751fd36 SHA-256: f8e7dc6bae629579456ed40b6c9f9d12361c4d33f5eba4002df42d3698416a8d
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was identified as malicious by ML classifiers and ClamAV, specifically flagged as a phishing trojan. It functions as a link farm, containing numerous URLs that point to compromised WordPress sites and other disposable hosting. These links are likely intended to lure users into downloading further malicious content or visiting phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9769

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
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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 https://t2sc.me/userfiles/51791203134.pdf
    • http://lempreintedubois.fr/userfiles/lempreintedubois.fr/file/dosusanup.pdf
    • http://www.pirac.org/wp-content/plugins/super-forms/uploads/php/files/2498564acaafb7b2aa26c804d2e2fd75/jurusitepigupopij.pdf
    • http://globalsocialwlefaresummit.com//app/webroot/uploads/ckuploads/files/32275078964.pdf
    • http://mountmedpharmacy.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1607692b5ea544---51279652399.pdf
    • https://macleanpinesdrivingschool.com.au/wp-content/plugins/super-forms/uploads/php/files/b4718913e6c86c040f1d2dbdd49f3c1b/48152628738.pdf
    • https://casabresciani.it/uploads/file/64628880755.pdf
    • https://forcechicago.com/wp-content/plugins/super-forms/uploads/php/files/14cb19714f7e01a6aaf7116a62179d6a/webipegoze.pdf
    • http://www.tif.cn/wp-content/plugins/super-forms/uploads/php/files/57nh5rn2bbe9lubg4veklts92i/85785430752.pdf
    • https://aviseco.ro/userfiles/file/gusovobulurilopig.pdf
    • https://travelselection.us/wp-content/plugins/formcraft/file-upload/server/content/files/160bd6a0dacf24---20171657401.pdf
    • http://www.scmphotography.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1607109c9b4010---majusip.pdf
    • http://aliglobshop.com/userfiles/file/63998935243.pdf
    • https://sketchup360.vn/wp-content/plugins/super-forms/uploads/php/files/gedklbak2p0jhvfc5tccdipfia/debawanepaxopomipuzeb.pdf
    • https://harpethvalleyhealth.com/wp-content/plugins/super-forms/uploads/php/files/bb87e699c603436f152afc69448a40a2/povew.pdf
    • https://ohligschlaeger-berger.de/wp-content/plugins/formcraft/file-upload/server/content/files/160b335a625d91---80071139954.pdf
    • https://ercrs.org/wp-content/plugins/super-forms/uploads/php/files/rqqd7hc7fa27m7b7ji9ns76j1u/19965939400.pdf
    • http://dpsszczytno.pl/photo/file/puguxofozodoral.pdf
    • https://www.andyselfstorage.co.uk/wp-content/plugins/super-forms/uploads/php/files/bdnplutrfcc9m27gj6o6lc948j/xikuzevonanidu.pdf
    • http://www.linkkorea.co.kr/wp-content/plugins/formcraft/file-upload/server/content/files/160832ed1f1b0a---75741824741.pdf
    • http://sieckultury.pl/wp-content/plugins/super-forms/uploads/php/files/a4d8130f8c55e6cb7cc6694fb60ab058/vuwexasuligotaw.pdf
    • https://www.audifonosdoshoydos.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a4acf626479---valakikererekazifomegi.pdf
    • https://veritiesinstitute.com/wp-content/plugins/super-forms/uploads/php/files/ff8b8a764ef66c6a773c0e2506b64b27/31306595033.pdf
    • https://www.acptechnologies.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b29e61c5b10---wavilebefulolavileviw.pdf
    • https://activepymes.com/pub/file/5492909923.pdf
    • https://www.scanworld.se/wp-content/plugins/formcraft/file-upload/server/content/files/16077c687d9fc1---gexowuvabesujevezegurek.pdf
    • https://kalatranslation.co.uk/wp-content/plugins/super-forms/uploads/php/files/78invbmc39gn0bnkd37kk7sqa7/gevimezibidibofolunoxoweb.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BkSY9tpko7c/uplcv?utm_term=hold+me+tight+emotionally+focused+therapy
    • 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f1f5.bin
f638baa95c33c0b1568e692c89002ab537f2ecd1132a200dcf5259d12bfbf5ba		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF1F5 5492 bytes
font_01_sfnt_off000105a2.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x105A2 16792 bytes
font_02_sfnt_off00011db9.bin
9ac9bf12b9417df9cd55806a2452ade85551ad77e12003bbc8b6d14659e1f422		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11DB9 11272 bytes
font_03_sfnt_off000137b8.bin
51b8202064ffbefce7a3d7eec405b0ca0c43cbea87a3fc1ff98ed71f38294a86		 pdf-font-stream PDF embedded font (sfnt) at offset 0x137B8 18100 bytes

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