Malicious PDF — malware analysis report

Static analysis result for SHA-256 6c06c5dd9bc21e6e…

MALICIOUS

PDF

82.5 KB Created: 2021-09-07 05:53:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: b9fc1729842daddff6a2c7a2e0d316e1 SHA-1: 558c454f8f78591b2adc0fbd996a4259fd663ccd SHA-256: 6c06c5dd9bc21e6e7299001c1af5f98b6e97ab049f6ac6e29095eea1db4bf061
164 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, many of which point to compromised WordPress sites or disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of a 'download' button lure further supports a phishing or scam attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

Heuristics 7

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=olimpia+splendid+unico+user+manual PDF link annotation
    • https://wildarium.com/ckfinder/userfiles/files/zedezagobepefomik.pdfIn PDF document text
    • http://aircond.md/upload_fck/file/98569728677.pdfIn PDF document text
    • https://melz-feu.ru/upload/94828080046.pdfIn PDF document text
    • https://www.officinadelgustoroma.com/wp-content/plugins/super-forms/uploads/php/files/cc64b21c4b6f3ea47a59bf42c8858dac/29675825343.pdfIn PDF document text
    • http://odesignlab.ru/admin/ckfinder/userfiles/files/pivemafozin.pdfIn PDF document text
    • https://shiokuda2.com/contents/files/48219229892.pdfIn PDF document text
    • http://conservationenergy.com/wp-content/plugins/formcraft/file-upload/server/content/files/16089d451765aa---74351935897.pdfIn PDF document text
    • https://frennphotography.com/wp-content/plugins/formcraft/file-upload/server/content/files/160705ebdec2ad---fupatevabifuwiweworo.pdfIn PDF document text
    • http://passaicvalleyclassof1957.com/clients/44362/File/93687941075.pdfIn PDF document text
    • https://yourwebcenter.com/files/file/24476301674.pdfIn PDF document text
    • http://udokutscher.de/gfx/userfiles/files/23879857250.pdfIn PDF document text
    • http://mackielaw.net/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/38752727302.pdfIn PDF document text
    • https://vinadesigndanang.vn/uploads/image/files/39420448586.pdfIn PDF document text
    • http://smartcookieacademy.com/wp-content/plugins/formcraft/file-upload/server/content/files/1611857fa21ca4---mofawafonudojep.pdfIn PDF document text
    • http://www.aportecnica.com/imagenes/editor/file/venelalade.pdfIn PDF document text
    • https://stcatherine.ac.ug/wp-content/plugins/formcraft/file-upload/server/content/files/160a7e522584f6---307071792.pdfIn PDF document text
    • http://naturallabs.fr/userfiles/file/nokifew.pdfIn PDF document text
    • https://www.energetisch-therapeut-estie.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1607be1ed45fbd---23138857432.pdfIn PDF document text
    • https://relaxationplusmn.com/wp-content/plugins/super-forms/uploads/php/files/830c40afa1c1c7d134c784d361f90314/14856247937.pdfIn PDF document text
    • https://dacoma.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1610a015fa3a81---60548199828.pdfIn PDF document text
    • http://dongfangguohua.com/ckfinder/userfiles/files/modevepup.pdfIn PDF document text
    • http://duoctruongxuan.vn/userfiles/image/file/pidiri.pdfIn PDF document text
    • https://verticala.ro/images/userfiles/94214376512.pdfIn PDF document text
    • https://futuresbuilder.net/dayafter/uploadimages/newsimages/file/7149121876.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_off0000d6f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD6F8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ef0f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF0F 10704 bytes
SHA-256: 2bc85e521b0f195ef6cc2e3e94fe3e168a89fe2f9f8324ba19cc46be1a7beb51
font_02_sfnt_off00010784.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10784 20076 bytes
SHA-256: 38dedd88361d5acf93c38f9805f0eb18b38e94e3663784ae5957b28714c07856

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