Malicious PDF — malware analysis report

Static analysis result for SHA-256 96d6832dae4a2998…

MALICIOUS

PDF

81.5 KB Created: 2021-09-22 23:15:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 622631ad8523717cb67aea4749603608 SHA-1: de4c7c0afd808c04088045f986d6af96c3a61859 SHA-256: 96d6832dae4a2998fc49e34eb2ffcf2915ef279f4526afcc553f8afc849d1a46
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous embedded URLs, many of which point to compromised WordPress upload directories or disposable hosting, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware delivery. Although no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of malicious redirection attempts.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

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://infrive.ru/uplcv?utm_term=how+to+cast+from+my+phone+to+my+smart+tv PDF link annotation
    • http://lex-ter.ru/admin/ckfinder/userfiles/files/regituvavedamol.pdfIn PDF document text
    • http://handsonmontessoripk.com/userfiles/files/vipazapuxogazivisovu.pdfIn PDF document text
    • http://winso.tw/userfiles/file/dejuxulufogilajobizagero.pdfIn PDF document text
    • http://timavoshipsupply.it/userfiles/file/wujewatifavubizosuxima.pdfIn PDF document text
    • https://bloomlight.pl/_bloom/file/27267152203.pdfIn PDF document text
    • http://yuseigachi.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16140b9790707a---xomezujoxumal.pdfIn PDF document text
    • https://impeka.lt/components/com_mijoshop/opencart/image/data/files/68607207663.pdfIn PDF document text
    • http://makairways.in/home/makairways2017/public_html/dowalumniusa/ckfinder/userfiles/files/42130081176.pdfIn PDF document text
    • http://exhibitionchannel.com/upload/42841993335.pdfIn PDF document text
    • http://www.wallisandemmanuel.com/wp-content/plugins/formcraft/file-upload/server/content/files/161353b0ec847c---mudireruzogunapes.pdfIn PDF document text
    • http://slsnn.ru/content/files/63509777131.pdfIn PDF document text
    • http://dailygameresult.com/editor/UserFiles2/files/fiwokabisag.pdfIn PDF document text
    • https://pelicanfinancialnetwork.net/ckfinder/userfiles/files/83738286847.pdfIn PDF document text
    • https://www.financedeclined.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1612ed3e3121b7---30337459457.pdfIn PDF document text
    • https://hsdinstruments.nl/uploads/files/kixuteberapetuwiduna.pdfIn PDF document text
    • http://fedime.org/imagenes/84782920625.pdfIn PDF document text
    • https://christianboudreau.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614ac9c1585a1---sulolugemug.pdfIn PDF document text
    • http://xn--80aer5aza.xn----htbdepbihnfb8cyg.xn--p1ai/ckfinder/userfiles/files/rabafinesikomirebogulup.pdfIn PDF document text
    • http://frappsreagent.com/upload/files/64621056361.pdfIn PDF document text
    • http://sporteambiente.it/ckfinder/userfiles/files/41774293720.pdfIn PDF document text
    • https://egf.tw/test2/images/file/rugoj.pdfIn PDF document text
    • http://bjerkelunden.org/content/files/userfiles/file///10949985540.pdfIn PDF document text
    • http://aadcnfgl.netsociality.com/upload/files/37741671598.pdfIn PDF document text
    • http://thibangoto.com/app/webroot/uploads/files/32521462775.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_off0000dbe6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBE6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f3fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3FD 10864 bytes
SHA-256: fdba381aca29363526d965049c05cc83fe1b3fb1cb16ff1056ab26f797fcda5f
font_02_sfnt_off00010cff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10CFF 17016 bytes
SHA-256: 54e204af4c1156d5e876cbe7c32476156612c49744f93b5745f5a2dd6515ea99

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