Malicious PDF — malware analysis report

Static analysis result for SHA-256 345930d7a7de6a43…

MALICIOUS

PDF

98.4 KB Created: 2021-06-26 09:54:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 6c74d1110ae0aee83cb19ca9b51dca2e SHA-1: a1385e119d8da0e5c38b66538eaf1437c6a62358 SHA-256: 345930d7a7de6a4369e1231606d1facb1591be7272f6dd612b6ff2b4bb1417a9
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1055.012 Process Injection T1204.002 Malicious Link

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. Heuristics reveal it functions as a link farm, with numerous URLs pointing to compromised CMS upload storage and disposable hosting. These links likely serve as lures for phishing or to download further malicious payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9928

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://chcial.ru/uplcv?utm_term=royal+high+primary
    • https://www.die-umzugsfabrik.com/wp-content/plugins/formcraft/file-upload/server/content/files/16070d02787f2b---80641396667.pdf
    • http://www.icodar.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a986c48912d---59199607113.pdf
    • https://actaviaserica.org/board/file/files/89128919153.pdf
    • http://claudiodauelsberg.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1608f8ddb66eba---10964197729.pdf
    • https://www.reliancecareuk.com/wp-content/plugins/super-forms/uploads/php/files/0d88085a31339ee6a99e34f559a784f5/simamutijobaxafis.pdf
    • https://baileyelectrical.services/wp-content/plugins/super-forms/uploads/php/files/pa598am6ap8t2d0f7lv8hvqned/15796813831.pdf
    • https://www.mercato.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160ac7be99d00a---perivusevevexezalu.pdf
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/160783e652160a---tazotul.pdf
    • http://www.louthadventures.ie/wp-content/plugins/formcraft/file-upload/server/content/files/1608178b8cc147---mipumugen.pdf
    • http://xz-brand.com/ckfinder/userfiles/files/lufaxamorozagovazilolokup.pdf
    • https://www.medicalart.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160c9be452c8a0---jogezegevejawozexusutew.pdf
    • https://foxtailmag.net/wp-content/plugins/super-forms/uploads/php/files/ad2518584413e39d2dbdaf88ff7548af/wesesukixo.pdf
    • https://www.escon.it/wp-content/plugins/super-forms/uploads/php/files/29e647a74de4fc4f16ab276a57a66809/67962029632.pdf
    • https://gbeequestriansurfaces.com/wp-content/plugins/super-forms/uploads/php/files/nda8gmm67c007v86l6emrvdg4u/nuzokepetupisisewelitomix.pdf
    • https://www.burit.net/wp-content/plugins/formcraft/file-upload/server/content/files/16079791126a90---17440506626.pdf
    • http://danfilenemd.com/clients/67744/File/vopafubobavekokisive.pdf
    • http://xn--e1aazeoc7d.xn--p1ai/images/shared/file/vorixiximegame.pdf
    • http://redactron.com/userfiles/file/dedapowiwivasetitofoxi.pdf
    • http://bagandpack.ru/wp-content/plugins/super-forms/uploads/php/files/efaf08901a6d92ae057ecdac7d25df46/85462181768.pdf
    • https://theshairpodcast.com/wp-content/plugins/super-forms/uploads/php/files/8a7326fe3748ed9d44c9acbc21e9b344/pekegiwixopajeribawidi.pdf
    • http://manufim.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/1607d75191ef26---xejiwetedibijuzaj.pdf
    • https://amd-export.com/site/upload/file/5399698430.pdf
    • https://www.pferde-fuer-unsere-kinder.de/wp-content/plugins/formcraft/file-upload/server/content/files/16071bd7a4f1d3---82501185534.pdf
    • https://drmiamiconnect.com/wp-content/plugins/super-forms/uploads/php/files/b18d1b0e7c1aa5fc0f3ca4be93d6de31/vupin.pdf
    • 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_off00011d09.bin
95790881b90219bd39037e0311dc74b921fa430346e3c32ee90a051efff173c4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11D09 18676 bytes
font_01_sfnt_off00014d1e.bin
8dc8861e7d7fe1736357169788a02cf83936926b50d3bb526c2a20e59a2f35de		 pdf-font-stream PDF embedded font (sfnt) at offset 0x14D1E 10356 bytes
font_02_sfnt_off00016479.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x16479 16792 bytes

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