Malicious PDF — malware analysis report

Static analysis result for SHA-256 99ac7fb6bcaa4d76…

MALICIOUS

PDF

90.1 KB Created: 2021-07-02 23:25:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: b1f124690c615f3040d361537e49fdbc SHA-1: 69f85ceee22d785ecd0aba007b69ed6bc063ecb5 SHA-256: 99ac7fb6bcaa4d76edfd8189829db90cdd922d19b6a40e441a12828e08635705
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as Pdf.Phishing.Trojan. The file contains a link farm pointing to compromised WordPress upload directories, suggesting it is used to distribute further malicious content or redirect users to phishing sites. The presence of numerous unknown URLs indicates a broad attempt to host or link to malicious payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9948

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 http://www.microsinusectomi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608217e852516---61094964631.pdf
    • https://sidexsideaudio.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609dd22099367---30827623721.pdf
    • http://www.auditsi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d5c7538cc4b---30649288591.pdf
    • https://textosolutionslinguistiques.ca/upload/editor/file/92089511942.pdf
    • http://mtecommerce.it/public/news/file/gilezaganufojosupas.pdf
    • https://rrvchefs.com/wp-content/plugins/super-forms/uploads/php/files/732a69f75eec3d8983811355987f469f/82381911774.pdf
    • http://biotop-zamosc.pl/userfiles/file/55835341459.pdf
    • https://reifenscho.de/wp-content/plugins/formcraft/file-upload/server/content/files/1606d9bcb5d607---48392573402.pdf
    • https://xn--80adj7cxa.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/9ab2ebccc4c7485eab04a144921a6b38/nutinorejelaxoz.pdf
    • https://jerseyshorepirates.com/userfiles/files/nuwugapas.pdf
    • http://gingerwooddesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/160792db0870a6---mubatomekidetubanuza.pdf
    • http://discarga.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a0212018fc3---fezebawiz.pdf
    • http://julieesteban.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d0adbf3b57---88244254996.pdf
    • http://projectbudapest.hu/wp-content/plugins/formcraft/file-upload/server/content/files/16075fa52d3120---55254698193.pdf
    • http://eachfun.com/ckfinder/userfiles/site_eachfun_com/files/52930935068.pdf
    • http://www.farparts.cl/wp-content/plugins/formcraft/file-upload/server/content/files/1609b48eed54a3---98591319417.pdf
    • https://askisan.com/upload/ckfinder/files/gabujisamixuwejawivudized.pdf
    • https://tuabogadoangel.com/wp-content/plugins/super-forms/uploads/php/files/b38a76a1856df1a165018abbdb960186/woxilaxagudabewul.pdf
    • http://victorylimo1.com/wp-content/plugins/formcraft/file-upload/server/content/files/16079c1c83dad5---48286322991.pdf
    • https://foundryindia.org/userfiles/file/bukobadikewomorefubupa.pdf
    • http://timatey.kz/wp-content/plugins/super-forms/uploads/php/files/dalohv172a3md39aof9n7j4o33/rupodajimew.pdf
    • http://www.justgiveahand.org/wp-content/plugins/formcraft/file-upload/server/content/files/1607d07180873c---26927410754.pdf
    • https://h1t-url12shio-turbo.com/contents//files/83260483571.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1KS0DP0cxss/uplcv?utm_term=dealing+with+seasonal+depression
    • 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_off0000fdea.bin
ce7a8d30cec00628376723e75b67161d02dc14dc1592b286d820aae85ca9671a		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFDEA 17284 bytes
font_01_sfnt_off00012b3b.bin
e1e66b88e397de3a8f91f545e81a496901ab2038f9c5586154d92a2969c0005f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12B3B 10756 bytes
font_02_sfnt_off000143bb.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x143BB 16792 bytes

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