Malicious PDF — malware analysis report

Static analysis result for SHA-256 6b7c652c9f33927c…

MALICIOUS

PDF

89.1 KB Created: 2021-07-14 02:58:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: e60ebe7acd01f158de6cbfd4428f2a45 SHA-1: c7b39f13b61c30d9ac29e29cba919eaed254bfa6 SHA-256: 6b7c652c9f33927cb161673be2ddeb58300386ea16fd2e425b484eb9fe614038
156 Risk Score

Malware Insights

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

This PDF file was flagged by ClamAV as a phishing trojan and by an ML classifier as malicious. It contains numerous embedded URLs that point to compromised WordPress sites and disposable hosting, suggesting it functions as a link farm. The primary purpose appears to be directing users to malicious content hosted on these external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9948

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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=slope+of+a+line+is+0 PDF link annotation
    • https://cutletsmeat.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c97ec23bb6---puzapip.pdfIn PDF document text
    • http://training-solutions.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1607df98e0fb47---79862074616.pdfIn PDF document text
    • https://drmiamiconnect.com/wp-content/plugins/super-forms/uploads/php/files/f7e8ce112dd19c2abc7b563b9e6bade3/36277104403.pdfIn PDF document text
    • http://amandamaitland.com/images/file/sipobakalibetulen.pdfIn PDF document text
    • https://www.edutechusa.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608fd8fdde4d6---xosojamoko.pdfIn PDF document text
    • http://neuragen.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1609cd0a210574---34191050890.pdfIn PDF document text
    • http://studiotecnicoarduini.eu/userfiles/files/86893170371.pdfIn PDF document text
    • http://hnc2.com/userfiles/file/40133927483.pdfIn PDF document text
    • http://christembassydocklands.org/wp-content/plugins/super-forms/uploads/php/files/9640c87589a7a348b01642ade90fda12/vagipomif.pdfIn PDF document text
    • https://relaxationplusmn.com/wp-content/plugins/super-forms/uploads/php/files/ca19a89840cbcb55dedba7213c6aa016/60369308231.pdfIn PDF document text
    • https://www.grecosalesinternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d49543abeb---xajuxabubigafupoloxadenim.pdfIn PDF document text
    • https://luxmarketing.agency/wp-content/plugins/super-forms/uploads/php/files/dhtkuleheoa4sa8104nlovrgvr/somobimaxin.pdfIn PDF document text
    • https://www.helpagesl.org/wp-content/plugins/formcraft/file-upload/server/content/files/160812c148c73e---rejifijavemipikuzo.pdfIn PDF document text
    • http://beerskiboot.com/img/upload/file/kenifujowejokajewepinov.pdfIn PDF document text
    • http://agiusfuneraldirectors.com/files/file/39856318142.pdfIn PDF document text
    • https://www.swx.global/wp-content/plugins/super-forms/uploads/php/files/f8a98c36e7f75dd6aef40e03244edf87/29929407817.pdfIn PDF document text
    • http://www.lightingandhvacexpo.com/wp-content/plugins/super-forms/uploads/php/files/d95e11aa11a8fb9c8a1d98611d7b22cf/81580823596.pdfIn PDF document text
    • http://lobanowscy.pl/userfiles/file/60700735020.pdfIn PDF document text
    • http://www.melodypods.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c091e937e85---gojuxukutekulesofepuwol.pdfIn PDF document text
    • http://voszveszprem.hu/_user/file/famulig.pdfIn PDF document text
    • http://lilit-realty.com/wp-content/plugins/super-forms/uploads/php/files/hkovg0gkvpejs7i8vifpe9l2b0/fifutijiliwodekowipuj.pdfIn PDF document text
    • https://unitedcardsolutions.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a88a4ec4c30---wonokotasewuxux.pdfIn PDF document text
    • http://roomyab.ir/basefile/roomyabir/files/modefimesijokosajulem.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_off0000fa80.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA80 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00011297.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11297 10348 bytes
SHA-256: 20517d0a25fc89a305a4608e0940fcd53f3f0e9e08083f98d0cb3bb337572416
font_02_sfnt_off00012a03.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12A03 17560 bytes
SHA-256: 613aad30210d90031ca50027e90e96e80fbb1b3a074bf9f0d059c7f37d4f30da

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