Malicious PDF — malware analysis report

Static analysis result for SHA-256 8c0fed1f340111bc…

MALICIOUS

PDF

121.8 KB Created: 2021-07-21 13:00:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 52ce0d1459149842a770a90e28b0918f SHA-1: f1f2c4a50554c371f37663cfb1b53e56c48f5707 SHA-256: 8c0fed1f340111bcaa48c700b38adb50b90b9530e6d46ce1a1015060a10b1209
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as Pdf.Phishing.Trojan. The document contains a link farm pointing to numerous compromised WordPress sites, suggesting an intent to redirect users to malicious content. The presence of multiple external URIs and compromised CMS upload links indicates a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9950

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://t4g.nasscomfoundation.org/wp-content/plugins/super-forms/uploads/php/files/1lcdalbhfi7ek1q6f3u44sr184/44941614625.pdf
    • http://protech.com.ng/wp-content/plugins/formcraft/file-upload/server/content/files/1606f59a5499bc---xojatiwiwapapujev.pdf
    • https://lotteppta.com/beta/assets/file/dajesaxavesozopile.pdf
    • https://www.hintonassociates.com/wp-content/plugins/super-forms/uploads/php/files/23c88fb90afeaf694c856c3335e60ab2/49474863792.pdf
    • https://thesmithgrouphouston.com/wp-content/plugins/super-forms/uploads/php/files/69df851cf9cb466fbed379e4f8d8ae4b/44125028652.pdf
    • https://www.ferienhof-schneider.de/wp-content/plugins/formcraft/file-upload/server/content/files/160c2d098918ba---gamufumebel.pdf
    • https://dmddsgn.com/wp-content/plugins/super-forms/uploads/php/files/325bd8eb8f646ad0b108e4bf254051ce/suponewerazojidosose.pdf
    • https://shinyjewellers.com/wp-content/plugins/super-forms/uploads/php/files/m2sbjida2v4ht3oh7vsip93u1c/59333080116.pdf
    • http://files.ibiza-ferien.de/file/vodojilijolosovawemibumul.pdf
    • https://yenhuy.vn/upload/files/mumasorerukorine.pdf
    • https://www.napariverinn.com/wp-content/plugins/super-forms/uploads/php/files/66ca71bbedb4d5d32e59e3a87e008edb/monuxururem.pdf
    • http://bigsvatcharasith.com/userfiles/file/tokomawofopaxuzoxov.pdf
    • http://parkwaywest1974.com/clients/861606/File/13941101138.pdf
    • http://agendatourvietnam.com/hinhanh/file/23630297728.pdf
    • http://vasilii-orlov.fun/wp-content/plugins/super-forms/uploads/php/files/3bcc7cf66ae9f196337007306df313df/walazivi.pdf
    • https://tempatpasang.com/contents//files/meloxajajewo.pdf
    • https://altbuket.ru/files/dimiwewazuxupoxonaluv.pdf
    • http://localhomesales.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160c28dfaf247d---36599077356.pdf
    • https://vipbeachhouse.com/uploads/editor/file/tarena.pdf
    • https://sckstone.com/wp-content/plugins/super-forms/uploads/php/files/05913bf9f712f6c6cc1f6b6bb3044372/61471335943.pdf
    • http://matstravel.ru/userfiles/file/nomifefaz.pdf
    • https://www.tctnanotech.com/wp-content/plugins/super-forms/uploads/php/files/9506167860f4b968fb65cbee66d9b05f/32394334052.pdf
    • http://naszymsladem.pl/upload/file/rinerawinazolitabigovijot.pdf
    • https://cleaner.pl/userfiles/file/ruzerujejigipat.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/Om9ozkHLxGw/uplcv?utm_term=chicago+manual+of+style+16th+edition+sample+paper
    • 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_off000176e4.bin
3883cccfa8ada6d7f6a7d150e7644ed08571eed337b4d4fb385f44270175c136
pdf-font-stream PDF embedded font (sfnt) at offset 0x176E4 17596 bytes
font_01_sfnt_off0001a4c3.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x1A4C3 16792 bytes
font_02_sfnt_off0001bcda.bin
d0bb6ecbb1d53d1475fdcfb73d71db8d8a379985e6781aae4be63f2b0d0f02ce
pdf-font-stream PDF embedded font (sfnt) at offset 0x1BCDA 11532 bytes