Malicious PDF — malware analysis report

Static analysis result for SHA-256 47a2cb0dd78042ce…

MALICIOUS

PDF

85.8 KB Created: 2021-09-07 13:02:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 08a9003fe5c821beda6e5ca15ce539d5 SHA-1: 2dd6a9da38353762e13d23776b4e96038ec40794 SHA-256: 47a2cb0dd78042ce4e2bbafe67d640345f09c2c35a9202a3aebf2d5562388ba0
156 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. Multiple heuristics point to the PDF being used as a link farm, directing users to compromised CMS uploads and disposable hosting sites. The presence of embedded URLs suggests an attempt to redirect users to malicious content, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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 http://goldmustang.com/files/files/44329544660.pdf In PDF document text
    • http://alnoorcity.com/userfiles/file/wuwegivedoj.pdfIn PDF document text
    • http://adice-area.com/pictures/files/dinelenajevewofusagokedo.pdfIn PDF document text
    • http://www.findvoters.com/userfiles/file/vimojitesaporuj.pdfIn PDF document text
    • http://ciba.lv/uploaded/file/dolelibim.pdfIn PDF document text
    • https://jin-ji.com/upload/files/zafapagapuno.pdfIn PDF document text
    • http://bet-balance.com/userfiles/file/bireledeveziwek.pdfIn PDF document text
    • https://deewo.de/wp-content/plugins/formcraft/file-upload/server/content/files/1611308bfd4480---87097872537.pdfIn PDF document text
    • http://le383.com/uploads/files/nusupekotusiperaloguw.pdfIn PDF document text
    • https://www.alarisusallc.com/wp-content/plugins/super-forms/uploads/php/files/f94a94d9a39446d6063e99e893558551/5750606240.pdfIn PDF document text
    • http://jshtextile.com/UserFiles/file///1501615210.pdfIn PDF document text
    • http://crystalnymph.by/wp-content/plugins/super-forms/uploads/php/files/c47d97fc49d6ed4db5ec3454c8ec6efb/sunuwevinekajujebew.pdfIn PDF document text
    • http://www.polni.si/Images/files/pafamuma.pdfIn PDF document text
    • https://catherinehourihan.art/wp-content/plugins/super-forms/uploads/php/files/146be2e28471b9f4b95145fb50133249/93013639290.pdfIn PDF document text
    • http://mattstergamer.com/wp-content/plugins/super-forms/uploads/php/files/42n49j4hnltg6alfoad6hdhjrv/3559871434.pdfIn PDF document text
    • http://www.morenoroofing.com/wp-content/plugins/formcraft/file-upload/server/content/files/16076b18eae723---18149111986.pdfIn PDF document text
    • https://ethiquedevelopers.com/wp-content/plugins/super-forms/uploads/php/files/aa24fcf4aca8dc83cacb8426c90c5a5c/zeromikanibowififinufifa.pdfIn PDF document text
    • http://cnc-soustruzeni.cz/files/file/78925403641.pdfIn PDF document text
    • http://go-trec.com/wp-content/plugins/super-forms/uploads/php/files/bodo2vdbm1rnulokdodr2lfegs/lesorazib.pdfIn PDF document text
    • http://www.opencalgary.org/wp-content/plugins/formcraft/file-upload/server/content/files/160b8477c1e6c9---wesinosi.pdfIn PDF document text
    • https://www.ojchamber.com/ckfinder/userfiles/files/14263783743.pdfIn PDF document text
    • https://adikketiga.com/contents//files/83782214131.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608139036ade6---301641487.pdfIn PDF document text
    • http://atlantichomeportugal.com/wp-content/plugins/formcraft/file-upload/server/content/files/16078bc8a239e0---58270699150.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/Om9ozkHLxGw/uplcv?utm_term=gastritis+aguda+y+cronica+pdf+2017PDF link annotation
    • 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_off0000e70b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE70B 11212 bytes
SHA-256: df544b63975f6717101891f05ed24995bff1e9c60f81ce5ad05a6522cf5c4d39
font_01_sfnt_off00010168.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10168 18812 bytes
SHA-256: 7186c35d61559322c2667cc709cb02e59df26ca8d9ea1e14741a40ca781bb48e
font_02_sfnt_off00013156.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13156 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1