Malicious PDF — malware analysis report

Static analysis result for SHA-256 eaa199f27c47652b…

MALICIOUS

PDF

84.0 KB Created: 2021-07-01 14:04:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: 98195360c45ea4577192fbfe666aa997 SHA-1: f5cff091703b0831543df83c6f13a1c1d64ce4ef SHA-256: eaa199f27c47652bcdc162bbe40f02b2bf4352c7f330a163504d21175fc33b4d
156 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to compromised WordPress sites, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution through these links. No scripts were extracted, and the document body was unreadable, so the analysis relies on the URL heuristics and AV detection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://playgametoday.ru/wp-content/plugins/super-forms/uploads/php/files/a112dd39d57174849fdbc168ef53df17/64401781056.pdf In PDF document text
    • https://www.inkfactory.pk/wp-content/plugins/formcraft/file-upload/server/content/files/1607e2763ade78---xomupotegudepevogu.pdfIn PDF document text
    • https://tatsolarlight.com/uploads/files/bigezojixaxafidanokedum.pdfIn PDF document text
    • https://www.uniqueartzz.com/wp-content/plugins/super-forms/uploads/php/files/ppfrjlguidghfrhk4u7hj8th5d/tafawolurufamosubawadu.pdfIn PDF document text
    • https://www.waterlooarmsnewforest.co.uk/wp-content/plugins/super-forms/uploads/php/files/fafa7824ef2f9b16ef35c90b1f30904b/beromoruvususeno.pdfIn PDF document text
    • http://premiumresourcing.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608acdc0e735a---65538517002.pdfIn PDF document text
    • http://clairvoyantinfotech.com/demo/images/12360161202.pdfIn PDF document text
    • http://arcomproltd.com/userfiles/file/galananivede.pdfIn PDF document text
    • https://unitedcardsolutions.com/wp-content/plugins/formcraft/file-upload/server/content/files/160877d1b15401---morekumovu.pdfIn PDF document text
    • https://joefairless.com/wp-content/plugins/super-forms/uploads/php/files/a006d7cc8b85d55272e582c47fb91b40/11244943740.pdfIn PDF document text
    • http://www.holzbau-hoelzl.at/wp-content/plugins/formcraft/file-upload/server/content/files/1607e749406e67---96127845817.pdfIn PDF document text
    • http://wawa757.com/uploads/files/85354269367.pdfIn PDF document text
    • http://dishandspoonproductions.com/ckfinder/userfiles/files/nipubog.pdfIn PDF document text
    • https://anzmrrn.org/wp-content/plugins/formcraft/file-upload/server/content/files/160aa4e1debb40---19534354091.pdfIn PDF document text
    • http://goref.ru/files/file/vitalikefiwe.pdfIn PDF document text
    • https://wurstfargo.com/wp-content/plugins/super-forms/uploads/php/files/53460ed346049e574ed3d9f70654a582/zafopudud.pdfIn PDF document text
    • http://creativeindustries.ru/uploads/userfiles/file/tuzazefafesiro.pdfIn PDF document text
    • https://turkihale.com/userfiles/file/vukefimofasojidumobod.pdfIn PDF document text
    • https://www.helmmsp.ca/wp-content/plugins/super-forms/uploads/php/files/b2c95719d498d117ae9758435efcfa3b/28212693266.pdfIn PDF document text
    • http://accessiblevehicleservices.com/userfiles/file/dopuwaxodetu.pdfIn PDF document text
    • https://www.tangelo.no/wp-content/plugins/formcraft/file-upload/server/content/files/160794afe2162d---28664972447.pdfIn PDF document text
    • http://jarosi.hu/files/file/54556787986.pdfIn PDF document text
    • https://asset-books.com/userfiles/file/zefizavogomodebix.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/fzgW7-mxBc0/uplcv?utm_term=bls+test+answers+2021PDF link annotation
    • http://e1pl2.nazwa.pl/busy/fotki/file/44820854751.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e5a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5A9 10324 bytes
SHA-256: 35f1f008538f0e227cc6343b99abae201fa336ba6a2756e94ef36fb67a6684b8
font_01_sfnt_off0000fd51.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD51 17004 bytes
SHA-256: 29b14c154a73b7f7e2002d696bd1ad1053fc630e31d3ceefb82dc6b8503a7c7b
font_02_sfnt_off00012978.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12978 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1