Malicious PDF — malware analysis report

Static analysis result for SHA-256 ec579e71e660ffbb…

MALICIOUS

PDF

80.9 KB Created: 2021-09-18 19:07:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 9e0c731e437dad19cc0a6534bc4b4664 SHA-1: a3998fc45897a0b0479a891e3d6d16e0495985cd SHA-256: ec579e71e660ffbb63ba76c7618b7727b18712cba4e6f5416bbfe094ab113fe4
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous links to external websites, many of which are hosted on compromised CMS platforms or disposable domains, indicating a link farm designed to redirect users. The ClamAV detection and ML classifier strongly suggest malicious intent, likely for phishing or distributing further malware. No scripts were extracted, but the document structure and URL patterns are indicative of a malicious lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://synerhu.ru/uplcv?utm_term=part+of+speech+exercise+pdf+with+answer PDF link annotation
    • http://pepinieres-soupe.com/userfiles/file/fuxupagedemiwoxijemevo.pdfIn PDF document text
    • https://west-holding.com/userfiles/file/nebigimepumesuledexotezuv.pdfIn PDF document text
    • http://xn--90ad5ackt1d.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/a2507dfdd6543647562740dbb7131215/tafexoxu.pdfIn PDF document text
    • http://h04ydivan.ru/userfiles/file/gevilexosowimenivaxapola.pdfIn PDF document text
    • http://novaserv.com/wp-content/plugins/formcraft/file-upload/server/content/files/16139e736b49f2---segaji.pdfIn PDF document text
    • http://pm-ural.com/uploads/files/zejap.pdfIn PDF document text
    • http://www.patricktennis.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1612efe4818c31---76854891329.pdfIn PDF document text
    • http://amadpich.com/userfiles/file/lamebedezowa.pdfIn PDF document text
    • https://calienglish.com/ckfinder/images_store/files/34290161949.pdfIn PDF document text
    • http://julieesteban.com/wp-content/plugins/formcraft/file-upload/server/content/files/16131b0aed4957---sipuwamuwepulozimegoxiga.pdfIn PDF document text
    • http://devison-matras.com/upload/file/41160784594.pdfIn PDF document text
    • https://pleasanton.com/wysiwygfiles/file/zurapig.pdfIn PDF document text
    • http://indemo.pl/Image/files/13829983978.pdfIn PDF document text
    • http://gintaras.cz/userfiles/file/39851850583.pdfIn PDF document text
    • http://www.alwaysflorida.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613da211f080e---bipazipona.pdfIn PDF document text
    • http://domoticasociale.it/immaginiNewsletter/file/tafixuniponekikuzi.pdfIn PDF document text
    • https://b7b.reviewz.eu/app/webroot/files/userfiles/files/getezusuxob.pdfIn PDF document text
    • https://www.kiakaha.gr/wp-content/plugins/super-forms/uploads/php/files/2hjggcgfi30ej69co964tu214k/dijegonilibuko.pdfIn PDF document text
    • http://wwsm-hk.com/files/file/5546643217.pdfIn PDF document text
    • https://systematix.pl/userfiles/file/fivabomogodimen.pdfIn PDF document text
    • https://littleitalypizzany.com/nbloom/fckuploads/file/jutetisajuvifa.pdfIn PDF document text
    • http://www.sanjuktabanerjee.com/fckimages/file/50055357630.pdfIn PDF document text
    • http://jtylek.pl/Upload/file/8216765381.pdfIn PDF document text
    • http://harlit.com/upfiles/file/84997633886In 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_off0000d64e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD64E 17912 bytes
SHA-256: ee0aeac0567996865e036fa925f93db14dd89f373e4f5450994beab3a24413df
font_01_sfnt_off0001046e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1046E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011c85.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C85 10860 bytes
SHA-256: eecebbfcb9f03d23c776995d705287f356e507235b1566b73bd36a4dd618610a

Open this report in the interactive analyzer, or submit your own file for analysis.