Malicious PDF — malware analysis report

Static analysis result for SHA-256 8e8f9447f71f297a…

MALICIOUS

PDF

115.9 KB Created: 2021-09-01 04:03:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 171a4e3eb65a0f4151f6ff71a8a8af3c SHA-1: f17d0d47e7322658928a4ecb5ef0b66265754b52 SHA-256: 8e8f9447f71f297a233161c9ff04f6da8b1683010ec1ffca317b05f1ec066060
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The file contains numerous links to external websites, many of which are hosted on compromised WordPress installations or disposable domains, suggesting a link farm or phishing lure. The presence of PDF_URI and PDF_SEO_DISPOSABLE_LINK_FARM heuristics further supports this, indicating the document's primary purpose is to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9930

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://pistant.ru/uplcv?utm_term=my+experiment+with+truth+pdf PDF link annotation
    • https://coloreverything.love/wp-content/plugins/super-forms/uploads/php/files/7ce706073c528e783161be006165c142/96891909809.pdfIn PDF document text
    • http://somersetcountybar.org/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/85328874882.pdfIn PDF document text
    • http://sunnyten.net/userData/board/file/19101094098.pdfIn PDF document text
    • https://utilitydiscount.com/wp-content/plugins/formcraft/file-upload/server/content/files/160fd9be142255---48534857446.pdfIn PDF document text
    • http://ecohouse-lab.com/userfiles/file/lamimominexujurazolokuxix.pdfIn PDF document text
    • http://coumert.com/images/file/gonekiroxobazeroras.pdfIn PDF document text
    • http://harchovyk.com/userfiles/file/sabejari.pdfIn PDF document text
    • https://www.frankcapassoandsons.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612ad259bdb28---45071562025.pdfIn PDF document text
    • http://sevimticaret.net/userfiles/file/83922920074.pdfIn PDF document text
    • https://ncfouting.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609c327aa1487---9236200391.pdfIn PDF document text
    • https://idd.no/ckfinder/userfiles/files/meduxigibumafaragokefofiv.pdfIn PDF document text
    • http://www.nationaalgolfcongres.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16079e4bc8f53b---jirazolonawofexaw.pdfIn PDF document text
    • http://abnicum.com/files/file/62694178914.pdfIn PDF document text
    • https://beribuket.ru/wp-content/plugins/super-forms/uploads/php/files/acdf702a88be3a90b71e6b8c871ae36e/kedebalepede.pdfIn PDF document text
    • http://whatdwellswithin.com/file/gavevididiwelapowosugolo.pdfIn PDF document text
    • http://tuzvedo.hu/elemek/file/45347994044.pdfIn PDF document text
    • http://cartonwrappingmachine.com/userfiles/file/62705232316.pdfIn PDF document text
    • http://stepasidemedical.com/images/uploads/file/16845202702.pdfIn PDF document text
    • http://lookkorea.net/userfiles/file/52132079392.pdfIn PDF document text
    • https://economiadecomunion.net/ckfinder/userfiles/files/36985194836.pdfIn PDF document text
    • http://myredm.ru/uploads/file/laneguludomesusaxuzumixu.pdfIn PDF document text
    • https://kipass.fr/userfiles/file/jorizurezukezipodonowixi.pdfIn PDF document text
    • http://teusz.pl/UserFiles/file/9920724455.pdfIn PDF document text
    • https://magiccat.pro/ckfinder/userfiles/files/babefozudugigut.pdfIn PDF document text
    • https://ddshower.com/ckfinder/userfiles/files/54148407350.pdfIn PDF document text
    • http://mgmkt.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16110b437b972b---batapoposopawifewivizexaj.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_off00015b8b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15B8B 20836 bytes
SHA-256: d443159d414cd712cbcc3433ee9132df5c2e08f5c345e22fe56448946f1ff160
font_01_sfnt_off00019199.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19199 10660 bytes
SHA-256: b4c9f5923b3e61e0205a0990385ef91f21ab58b8ab88cf38cc32ff09c4cb69ec
font_02_sfnt_off0001a9d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1A9D6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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