Malicious PDF — malware analysis report

Static analysis result for SHA-256 cefd12568887652e…

MALICIOUS

PDF

75.7 KB Created: 2021-09-09 07:44:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 8f565e86fca9795f4db123679b030a58 SHA-1: ab0979a610e519f416fd6295f0cad60c5715a6b0 SHA-256: cefd12568887652e3a1f82b1ba44ae1eb98e087fe20bb27e218659279224f8fc
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF file was identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous embedded URLs, many of which point to compromised WordPress sites or disposable hosting, suggesting it functions as a link farm. The primary goal appears to be directing users to external sites, likely for phishing or to download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

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://garglob.ru/uplcv?utm_term=how+to+get+any+snapchat+password PDF link annotation
    • http://www.playerclub.ro/wp-content/plugins/formcraft/file-upload/server/content/files/161397aa5afcde---segirop.pdfIn PDF document text
    • http://studiotecnicomancini.eu/userfiles/files/80954429531.pdfIn PDF document text
    • http://chayka-svg.ru/files/62651412907.pdfIn PDF document text
    • http://sunpix.ru/img/lib/file/bebubugov.pdfIn PDF document text
    • https://domilot.com/uploader/files/gilolof.pdfIn PDF document text
    • https://bunexim.dascalita.ro/app/webroot/files/userfiles/files/73004277675.pdfIn PDF document text
    • http://elijasprojekts.lv/files/file/72008929939.pdfIn PDF document text
    • http://rrbrentacars.com/files/others/vojapemejilupe.pdfIn PDF document text
    • http://jockmurray.com/wp-content/plugins/formcraft/file-upload/server/content/files/16137db2f46252---sojazojikitizanufoviw.pdfIn PDF document text
    • http://braghieriarchitettura.com/userfiles/files/gukedonigodibidu.pdfIn PDF document text
    • https://muacash.com/webroot/img/files/63653368528.pdfIn PDF document text
    • http://almawred-sy.com/files/adminfiles/files/tubedifovimetivut.pdfIn PDF document text
    • http://21cedu.com/pds/userfiles/files/wedorurit.pdfIn PDF document text
    • https://dpengineers.info/admin/userfiles/file/bitomepojog.pdfIn PDF document text
    • http://dzirerealtors.com/uploads/59981600230.pdfIn PDF document text
    • http://morenoroofing.com/wp-content/plugins/formcraft/file-upload/server/content/files/161339a6934faf---gexudujurizi.pdfIn PDF document text
    • http://veterinariomauracotti.it/userfiles/files/21342008284.pdfIn PDF document text
    • http://khacvietlaser.vn/public/images_news/files/27991395577.pdfIn PDF document text
    • http://htwy.com/upload/file/pemuw.pdfIn PDF document text
    • http://arredamenticucinesiciliane.it/userfiles/files/disejaleropebomota.pdfIn PDF document text
    • http://podlahyadvere.sk/editor_uploads/system/files/87734843694.pdfIn PDF document text
    • https://s-serviss.lv/userfiles/file/39547307343.pdfIn PDF document text
    • http://gniortho.com/files/Upload/file/39130981552.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_off0000bf36.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBF36 18596 bytes
SHA-256: 6ca49d14771a0151a373d3719fd09ec571ff410590b7caa4c6968879c3b4a9f9
font_01_sfnt_off0000ee8e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE8E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000106a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106A5 10844 bytes
SHA-256: babf08bfed5be25fe160119399bc089e2e788ce811673fef5115189a63dadb88