Malicious PDF — malware analysis report

Static analysis result for SHA-256 d25e2986e5fc3778…

MALICIOUS

PDF

104.3 KB Created: 2021-07-07 02:50:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 9b88dbec6885c651ea7e29aa6566926d SHA-1: ab2b87d9d14add71d3d3634769deddd47d87ff97 SHA-256: d25e2986e5fc3778bf250a5210c53583561e7edd0c271fb2536b9781c58c45b2
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics and a machine learning model as malicious, with ClamAV identifying it as Pdf.Phishing.Trojan. The numerous embedded URLs pointing to compromised CMS uploads and disposable hosting suggest a phishing or malware distribution campaign. Although no scripts were explicitly extracted, the PDF structure and heuristic firings indicate it's designed to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9919

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 https://allytemp.ru/uplcv?utm_term=example+of+basketry PDF link annotation
    • https://baxsporthorses.com/userfiles/file/ripomogix.pdfIn PDF document text
    • https://hps-gruppe.com/wp-content/plugins/super-forms/uploads/php/files/ng4hcheum859hfrfk5r4qrki5d/xukim.pdfIn PDF document text
    • http://brooklinehs1964.com/clients/6/6a/6a3559cec3eb17f551da2d864c8c85ab/File/32331359886.pdfIn PDF document text
    • http://coimbra.hu/uploads/ckfinder/userfiles/files/66927703497.pdfIn PDF document text
    • https://mttrasportisrl.it/dati/upload/file/31935641812.pdfIn PDF document text
    • https://ecef-groupe.com/wp-content/plugins/super-forms/uploads/php/files/eo7oaamvdciicaaemm5bchesd4/74518554395.pdfIn PDF document text
    • http://www.gabrielamaciel.net/images/content/file/36621015134.pdfIn PDF document text
    • https://baileyelectrical.services/wp-content/plugins/super-forms/uploads/php/files/4f22ucpdarsqbfmtn8ddaonn3c/bojajufetaxinuz.pdfIn PDF document text
    • http://fitviewer.biz/files/file/pelovojijumavepek.pdfIn PDF document text
    • https://luxartparquet.com/wp-content/plugins/super-forms/uploads/php/files/db917f317c2125215b6fa10734efeb0e/7586017986.pdfIn PDF document text
    • http://www.trimbleexpress.sk/wp-content/plugins/formcraft/file-upload/server/content/files/1608173d520353---babuwanil.pdfIn PDF document text
    • https://clifestyle.net/uploades/userfiles/file/misoxomima.pdfIn PDF document text
    • https://www.shopveriamici.com/wp-content/plugins/super-forms/uploads/php/files/i7ag0vplpqqv65o74f3sh4il7c/majetoladuno.pdfIn PDF document text
    • https://youstore21.com/wp-content/plugins/super-forms/uploads/php/files/5593804bece1d0814b0256f1566a118e/wawurutorozinitojikexi.pdfIn PDF document text
    • http://www.donboscovizag.org/images/files/33177884411.pdfIn PDF document text
    • https://creationstationdance.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608e042751b00---54502007472.pdfIn PDF document text
    • https://mediabandit.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cac0b1f3f2---rofesixuwuxawenemufew.pdfIn PDF document text
    • https://jdbailbonds.com/wp-content/plugins/super-forms/uploads/php/files/b6e19352c6fb16cd8c38aeb8d838129b/39030486656.pdfIn PDF document text
    • http://www.sport-konyv.hu/userfiles/file/99091050946.pdfIn PDF document text
    • https://humanistbeauty.com/wp-content/plugins/super-forms/uploads/php/files/7i6ubvjghm0u2bpicodq2fa3ht/58159488086.pdfIn PDF document text
    • https://www.revistadefiesta.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609422320553b---89854441805.pdfIn PDF document text
    • http://katyababash.com/images/uploads/file/64761001794.pdfIn PDF document text
    • http://aceonlinementors.com/userfiles/file/nazisafugoresubeguvexowix.pdfIn PDF document text
    • http://alpanelektrik.com/depo/sayfaresim/file/zewodijiruvofemesig.pdfIn PDF document text
    • http://www.louthadventures.ie/wp-content/plugins/formcraft/file-upload/server/content/files/160723e795172a---saxupusinazipu.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_off000135cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x135CD 10752 bytes
SHA-256: c73718cd7ee11a237a58c9e13d67875e8b79d870a9e13e9480aa0cafe5d91474
font_01_sfnt_off00014e6c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14E6C 16916 bytes
SHA-256: f5786c8570023e47dc8fcfc150cd4ba1b0ca54ab639b846bce633f93040f42c2
font_02_sfnt_off00017a73.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17A73 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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