Malicious PDF — malware analysis report

Static analysis result for SHA-256 8ee97dca1d245368…

MALICIOUS

PDF

99.4 KB Created: 2021-08-06 03:38:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-17
MD5: 4a348dfb856f03161d105e1be57bfd34 SHA-1: 4d0ac9098bd8f9ce01608ad072e773f47f0ecefb SHA-256: 8ee97dca1d2453686d01f20a1ea15cc3994531902ff65f2f50a74a11af4e4a20
164 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. It contains numerous embedded URLs pointing to compromised websites and potentially disposable hosting, suggesting a link farm or phishing lure. The presence of a 'download button' heuristic further supports the idea that the document is designed to trick users into downloading a payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://queure.ru/uplcv?utm_term=12th+english+guide+pdf+free+download+2020+namma+kalvi PDF link annotation
    • https://floorco.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/be9961fbdf45f4023cb7e37ec89dd43f/rurunozafipinireg.pdfIn PDF document text
    • http://kangs78.com/clients/66216/File/93417544383.pdfIn PDF document text
    • http://xn--80ackbssfuieecff0e8c.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/eh6ll9jl4t48jkp2a3lco8nvg3/45236010275.pdfIn PDF document text
    • http://garmagostaran.com/Upload/file/80892950143.pdfIn PDF document text
    • http://vibrosystem.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1609c0b0bb94bb---12338018700.pdfIn PDF document text
    • https://siahotel.com/userfiles/files/tekimoverepud.pdfIn PDF document text
    • https://www.nobleorthodontic.com/wp-content/plugins/super-forms/uploads/php/files/1431ef531acca6ef611ede9e35ffaea7/82443153198.pdfIn PDF document text
    • https://www.rydalmereprestige.com.au/wp-content/plugins/super-forms/uploads/php/files/10j8md3bv5edggjhnj14pq64l2/80023455177.pdfIn PDF document text
    • https://www.horisunmauritius.com/wp-content/plugins/super-forms/uploads/php/files/429d59d78c8320fd33028e49116ebecb/zimizabumejivaw.pdfIn PDF document text
    • http://churchliferesources.org/wp-content/plugins/formcraft/file-upload/server/content/files/16092abb23e0e3---xotepalanu.pdfIn PDF document text
    • https://mimpishio2.net/contents//files/wonudabux.pdfIn PDF document text
    • http://cedule-plachty.cz/files/file/69396787549.pdfIn PDF document text
    • https://xn--80aaaglcftt5alesfkk7f.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/4115814746d3049fbef75d3c9a9c13cc/4634655532.pdfIn PDF document text
    • http://pekingtogo.com/uploads/files/divukerabasit.pdfIn PDF document text
    • https://g3az.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608a31af93d08---87757804604.pdfIn PDF document text
    • https://leesman.com/wp-content/plugins/super-forms/uploads/php/files/e4913b47ec73c55044e05e8d16bc9ac7/16181669699.pdfIn PDF document text
    • http://lamorenj.com/userfiles/files/tojuvaxafofitewijogek.pdfIn PDF document text
    • http://skuplaptop.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160b74655994fa---pupuxaluzotigozapetolovap.pdfIn PDF document text
    • https://ksuskalology.com/images/file/tuxeridigojijenalerike.pdfIn PDF document text
    • http://score1forspencer.com/clients/4/45/4587145e2679cb7673d0e21b436e5c25/File/13836514511.pdfIn PDF document text
    • http://www.radeton-cz.vasestranky.cz/ckfinder/userfiles/files/15701499412.pdfIn PDF document text
    • https://debcopharma.com/userfiles/file/86424720127.pdfIn PDF document text
    • https://worldkelo.com/wp-content/plugins/super-forms/uploads/php/files/5bb97380950eb3033b3947c4dcddd4cc/dekimigikakemekuvobexabuw.pdfIn PDF document text
    • http://wrhs1967.org/clients/6/61/617565fc8afb9cc6d18abf932d248b7a/File/vakixabeve.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_008_off000150a5.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x150A5 17488 bytes
SHA-256: 643de1313de4f8b27e17f4c0c1a2b4a85dceab376e94aa7568872c95aead1f86
font_00_sfnt_off000107e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107E5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00011ff6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11FF6 16200 bytes
SHA-256: d18549a7693e6e5643e7967f8d95f5b59cf8b8daf4943325343c5aca4602dcd0
font_02_sfnt_off000135ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x135CA 11488 bytes
SHA-256: 008962c3656fe4765a10f5cc7d9ff72e744309a663c9940c690f187bfdfd34c5

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