Malicious PDF — malware analysis report

Static analysis result for SHA-256 5e92566f253eca82…

MALICIOUS

PDF

90.9 KB Created: 2021-07-24 10:41:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 1112594017b2fc5a217341f2e6206ecc SHA-1: 389031769de40396812f550af01895103a6ef4d4 SHA-256: 5e92566f253eca82ee7f1bd4355b329dc987659a63056ca57630f85de8593de1
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF was flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier as malicious. It contains a link farm with numerous URLs pointing to compromised CMS uploads, suggesting a phishing or redirection attempt. While no scripts were explicitly extracted, the PDF structure and URL patterns are indicative of malicious intent, likely to lure users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9970

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://imagespa.mx/wp-content/plugins/formcraft/file-upload/server/content/files/160aba9b41c200---fevadugefamowovawuxokij.pdf In PDF document text
    • http://artmetinc.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d871d1fafb---xekowopojiruso.pdfIn PDF document text
    • http://decamiones.com/userfiles/file/56836123527.pdfIn PDF document text
    • http://mindatpeace.us/uploads/files/vatumobigugo.pdfIn PDF document text
    • http://studioguatta.it/userfiles/files/fumiluwu.pdfIn PDF document text
    • http://www.sunarmisir.com.tr/wp-content/plugins/super-forms/uploads/php/files/0lm8vmumnpk5du956r1gi61fp5/51278565079.pdfIn PDF document text
    • https://www.llgnjinc.com/wp-content/plugins/super-forms/uploads/php/files/6df8a4ac761eb38b3be0e06afcf7ad0c/rejogelomefikubatatado.pdfIn PDF document text
    • http://kwik-it.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160d5b68b74d3a---xulumukigi.pdfIn PDF document text
    • https://www.webhisto.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160b6566de37cf---22935699764.pdfIn PDF document text
    • http://offerseir.com/basefile/offerseircom/files/86514443404.pdfIn PDF document text
    • https://alarrabnews.com/images/content/content/file/jineboniv.pdfIn PDF document text
    • http://apexnepaltravel.com/userfiles/file/terewubakazuvelulukofe.pdfIn PDF document text
    • http://namhungholdings.com/uploads/ckfinder/files/metuvuvixilepotiwum.pdfIn PDF document text
    • https://aterhesseg.com/up_image/file/96096202525.pdfIn PDF document text
    • https://www.femregenx.co.za/wp-content/plugins/super-forms/uploads/php/files/49t2mh5gopsrhuh890s6lr85jh/95443797468.pdfIn PDF document text
    • https://mygenius.ru/admin/ckfinder/userfiles/files/mokazagaso.pdfIn PDF document text
    • https://avis-medical.ma/wp-content/plugins/super-forms/uploads/php/files/7c08167fa9263b059d85e5cb979d8668/pogeritilegonadolisaveku.pdfIn PDF document text
    • https://www.capitalroofingct.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f0cb0382dd---56173887998.pdfIn PDF document text
    • https://www.cfo-search.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608a577cc0b40---48488858951.pdfIn PDF document text
    • http://alphabodysupplements.com/newerac2c/userfiles/file/4924408004.pdfIn PDF document text
    • http://festivaldeliteraturadepereira.com/wp-content/plugins/formcraft/file-upload/server/content/files/16092dc8577393---33014599594.pdfIn PDF document text
    • http://objetivovender.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac5255951c4---80826375052.pdfIn PDF document text
    • https://www.criteriainvest.com.br/wp-content/plugins/super-forms/uploads/php/files/3ovm6h6atf4g9qd63tdk5l4fuk/punebunazekes.pdfIn PDF document text
    • http://adams-gold.ru/archive/image/file/purezavapup.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BkSY9tpko7c/uplcv?utm_term=ticket+to+ride+windowsPDF 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_off0000ffe5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFE5 10296 bytes
SHA-256: e46f1d8c3875c991af9dae26abe2204f411ebd57b278c4353d79fc1f7c619efb
font_01_sfnt_off00011753.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11753 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012f65.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12F65 17276 bytes
SHA-256: 29a00e3415f2fb665575ee8d45bd8219edc9903babc65be55adc58b6089d2d51