Malicious PDF — malware analysis report

Static analysis result for SHA-256 c07c10212f3aa2cd…

MALICIOUS

PDF

81.6 KB Created: 2021-08-22 11:46:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: a769ab6e38c22a858abe450117b263ec SHA-1: 812526bc1685b6a38e26249b6670ea0c4fda473c SHA-256: c07c10212f3aa2cd5181a738d8dfd5b2249a560918e988331e7afd3b62a3aacc
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating it likely exploits a vulnerability or contains malicious content. The file functions as a link farm, with numerous embedded URLs pointing to various domains, many of which appear to be compromised or disposable hosting. The primary purpose seems to be redirecting users to potentially harmful sites, possibly for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9987

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 http://whatifitspossible.com/ckfinder/userfiles/files/72237333180.pdf In PDF document text
    • http://bualuang101.com/backoffice/upload/files/bipewigunuvufugisejapo.pdfIn PDF document text
    • http://for-rent-aalst.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a77bb235fe1---repobalogafobidileno.pdfIn PDF document text
    • http://donghozibistore.com/luutru/files/82668027710.pdfIn PDF document text
    • https://jollytime.ru/wp-content/plugins/super-forms/uploads/php/files/2cc0272b87d62696bcbaabb54da09f60/juremerunomeno.pdfIn PDF document text
    • http://palirna-frydek.cz/uploaded/file/fusajufu.pdfIn PDF document text
    • https://hotelristorantenovecento.it/wp-content/plugins/super-forms/uploads/php/files/365b8f451c03204e930b691d0cbc46b9/sulixozuti.pdfIn PDF document text
    • https://sckprime.com/wp-content/plugins/super-forms/uploads/php/files/a265b93fea721cb7120694abecada6ee/mopebepifalakofi.pdfIn PDF document text
    • https://agrimal.pl/userfiles/file/ziwivalose.pdfIn PDF document text
    • https://vegas-shop.net/uploads/files/91355229878.pdfIn PDF document text
    • http://rebeccaosborne.com/uploads/lojotos.pdfIn PDF document text
    • http://andreevmag.com/wp-content/plugins/super-forms/uploads/php/files/c6dc996974370828d5a1a80680ddfb29/jatefilatafen.pdfIn PDF document text
    • http://mellorymotors.ru/admin/ckfinder/userfiles/files/mijevipililetabifur.pdfIn PDF document text
    • https://flvirginia.com/wp-content/plugins/super-forms/uploads/php/files/3e9c892a2e0fce2e856e08c5172cf080/92812184246.pdfIn PDF document text
    • http://cachnhietcacham.vn/Images_upload/files/runelodu.pdfIn PDF document text
    • http://www.nanodrywash.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b79ead25761---zopowikefabeporumone.pdfIn PDF document text
    • https://www.gurkhasfinance.com.np/ckfinder/userfiles/files/39628539256.pdfIn PDF document text
    • http://frederickfollows.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160a641f20f4db---dodokasesajejixu.pdfIn PDF document text
    • http://vasilii-orlov.fun/wp-content/plugins/super-forms/uploads/php/files/1ca3b05615dabf734f5e2e007daad963/regakimejubulirolotugawo.pdfIn PDF document text
    • http://ippinnudon.com/uploads/files/56311418115.pdfIn PDF document text
    • https://www.pferde-fuer-unsere-kinder.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608be6882f934---bobudipirotiz.pdfIn PDF document text
    • http://wahluenfty.com/userfiles/90432288537.pdfIn PDF document text
    • https://promtour-rural.ro/userfiles/file/54247421043.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/fzgW7-mxBc0/uplcv?utm_term=beowulf+study+guide+questions+and+answers+quizletPDF link annotation
    • 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_off0000d74c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD74C 11088 bytes
SHA-256: 19b29e6d074205dc55bbcd59ad878c235a5092bb8a3d81f147b88295db4ed328
font_01_sfnt_off0000f0e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0E8 17728 bytes
SHA-256: 67f69292504a034b6260fe685c2522df0a70aa988db3ed7a5b0bcfe4a5eddb7d
font_02_sfnt_off00011f9e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F9E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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