Malicious PDF — malware analysis report

Static analysis result for SHA-256 beea6655773a6d7f…

MALICIOUS

PDF

241.1 KB Created: 2021-08-07 00:50:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 2e615c8e5583c1e77647a227c11ec2fc SHA-1: 126fd98633f64cbd40e69154333c463278f4e70b SHA-256: beea6655773a6d7f8178b5cbbcd93adec13697d53f341e5ecf133ea7bcf1536d
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous links to external URLs, many of which point to compromised WordPress upload directories, suggesting a phishing or credential harvesting campaign. The presence of PDF_URI and EMBEDDED_URL heuristics further supports the attack pattern of directing users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7697

Heuristics 5

  • 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.
  • 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://coretry.ru/uplcv?utm_term=gratis+organisationsschema+mall+f%C3%B6r+skuldebrev PDF link annotation
    • https://www.3dreamchurch.com/wp-content/plugins/super-forms/uploads/php/files/3168e49a837150bfbed44f55087a29fd/runenevutelareti.pdfIn PDF document text
    • https://aquariumfargo.com/wp-content/plugins/super-forms/uploads/php/files/a8e0b72e85395b3bd72adf5f9155a91d/fulisigeseximagumiwa.pdfIn PDF document text
    • https://butagallery.com/userfiles/files/30668511667.pdfIn PDF document text
    • https://comfort8889.com/upload/files/kerumolugiwatebez.pdfIn PDF document text
    • http://cjcounsel.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/56808763529.pdfIn PDF document text
    • https://dcoderesearch.com/uploads/dowotanabagevipinuxapu.pdfIn PDF document text
    • http://1night2day.com/ckupload/files/69148638752.pdfIn PDF document text
    • http://didopack.com/files/jojarijovatudaw.pdfIn PDF document text
    • https://korzayithalat.com/spot/admin/fckeditor/userfiles/file/munesuvepupobute.pdfIn PDF document text
    • http://candientushinko.com/images/file/31310863491.pdfIn PDF document text
    • https://www.fecomerciomg.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/160bcbf4d568e2---97053210118.pdfIn PDF document text
    • http://for-rent-leuven.com/wp-content/plugins/formcraft/file-upload/server/content/files/16080a2332b711---38782170844.pdfIn PDF document text
    • https://realwebguys.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b27a960aa55---vonanenuxetajodelaxu.pdfIn PDF document text
    • http://chi-kara.net/userfiles/file/wemolafafaziguleni.pdfIn PDF document text
    • http://stylist.in.ua/wp-content/plugins/formcraft/file-upload/server/content/files/160ba871a2ed3a---4246895639.pdfIn PDF document text
    • https://www.cocochan.com.pk/wp-content/plugins/super-forms/uploads/php/files/bb9b1d19758ac7a68e72f7781ae5bcd2/73820693022.pdfIn PDF document text
    • https://insights3.com/wp-content/plugins/super-forms/uploads/php/files/6af2ebc5a5a64b9d9728dcecaa12ee3d/97237497897.pdfIn PDF document text
    • http://karthikeyanjayaram.com/userfiles/file/71793684712.pdfIn PDF document text
    • http://accomplishtheimpossible.com/userfiles_ati/file/tuvefofodafawukufijipusu.pdfIn PDF document text
    • http://usaoxin.com/userfiles/2021-5/file/62143892034.pdfIn PDF document text
    • https://energooptima.hu/upload/File/13809450551.pdfIn PDF document text
    • https://gastrotest.co/ckfinder/userfiles/files/32186360680.pdfIn PDF document text
    • https://adbetelparaguay.com/wp-content/plugins/super-forms/uploads/php/files/e5dabf53dac77aa5e05e9934fc90b1e0/nomedewezorizefenamifewu.pdfIn PDF document text
    • http://northjerseyseniormenssoftballleague.com/clients/2/22/22e10641a135963e7b476298ec508c3c/File/23223180215.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_off00034c3e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x34C3E 19560 bytes
SHA-256: 9fd66a4ae68f50838834a91244c9c27ec347293dad14f9d5b42f27f828abc66f
font_01_sfnt_off00037e92.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x37E92 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000396a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x396A9 11572 bytes
SHA-256: 7319f53f0a09c0ccb35d40d2e487995690280b183bf2d30d4c0fd7bf80c501a8