Malicious PDF — malware analysis report

Static analysis result for SHA-256 082bf7a7ac3154de…

MALICIOUS

PDF

84.8 KB Created: 2021-07-14 06:02:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 17b2f47e009fffdb1b62fa464789e891 SHA-1: 7470a9c60de672e75b9af54ff7bfec66761783c4 SHA-256: 082bf7a7ac3154de19e63f27b206e508610cfe81f08f4a2489eccb0b27d039cc
156 Risk Score

Malware Insights

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

The PDF file contains numerous links pointing to various domains, many of which are hosted on compromised CMS platforms or appear to be disposable. This structure strongly suggests a link farm designed to lure users into clicking on potentially malicious content, likely for phishing or malware distribution. The ML classifier and ClamAV detection further support the malicious nature of this PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9860

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://adamlegal.com/userfiles/file/vubeteropivinerakudowafi.pdf In PDF document text
    • https://nobleanimalsanctuary.org/wp-content/plugins/super-forms/uploads/php/files/tmp/woromukexitadojo.pdfIn PDF document text
    • http://betaempire.com/uploads/userfiles/file/file/92674004944.pdfIn PDF document text
    • http://usagimatur.com/files/others/mafuxakasarer.pdfIn PDF document text
    • http://www.toptehnik.si/images/pegefuwowelijipegodo.pdfIn PDF document text
    • http://illinoislivestock.org/userfiles/file/32336743307.pdfIn PDF document text
    • http://www.etoiles-recrutement.com/wp-content/plugins/formcraft/file-upload/server/content/files/160da007a6e5fb---90177511599.pdfIn PDF document text
    • http://modellszerviz.hu/userfiles/file/87167291980.pdfIn PDF document text
    • https://pikewallis.no/wp-content/plugins/formcraft/file-upload/server/content/files/160a2f753495da---52762503432.pdfIn PDF document text
    • http://aliceinformaticasrl.com/user/pages/79784900452.pdfIn PDF document text
    • http://suttonoakfarms.com/clients/880813/File/76730918573.pdfIn PDF document text
    • https://flvirginia.com/wp-content/plugins/super-forms/uploads/php/files/66e950fcba9f768c83fd2082f58943ae/74268024918.pdfIn PDF document text
    • https://cruiseship.cruises/wp-content/plugins/super-forms/uploads/php/files/cflnev2jnk1rsgfegvc3pl2h1c/84507172419.pdfIn PDF document text
    • http://lbs.ac.at/wp-content/plugins/super-forms/uploads/php/files/htmada6vvj2821a328fqm1efmr/76925077245.pdfIn PDF document text
    • http://alibabashipping.com/userfiles/file/69382445486.pdfIn PDF document text
    • https://kvartira-zalog.ru/wp-content/plugins/super-forms/uploads/php/files/e8d24fa05189ddcde4dd8c46aa2b067b/72829774820.pdfIn PDF document text
    • http://www.canadavisaservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/16078a159210b3---180340178.pdfIn PDF document text
    • http://www.adatechotomasyon.net/wp-content/plugins/formcraft/file-upload/server/content/files/160a90716c3c8c---59550705400.pdfIn PDF document text
    • http://chocolatycakes.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b6332f9a236---78966150225.pdfIn PDF document text
    • https://anakmeong.com/contents//files/98197630454.pdfIn PDF document text
    • http://tivatijapan.com/uploads/userfiles/file/xinipapipubafadebedara.pdfIn PDF document text
    • http://boulderdivorcelaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/160884fb9bcfe4---migexuti.pdfIn PDF document text
    • https://www.advids.co/wp-content/plugins/formcraft/file-upload/server/content/files/160a3ce0523ecc---nefijinuzixerorumero.pdfIn PDF document text
    • https://baxsporthorses.nl/userfiles/file/48279034782.pdfIn PDF document text
    • http://www.oschouston.com/osc/wp-content/plugins/formcraft/file-upload/server/content/files/160a2cd20d2cf2---52593702131.pdfIn PDF document text
    • http://www.scmphotography.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160c8ba4549401---62574351298.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1KS0DP0cxss/uplcv?utm_term=texas+gift+title+transfer+formPDF 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_off0000e923.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE923 10624 bytes
SHA-256: 58e858b0c323372dabecbdf26d09e837ef864824539b3ac92c3c1a784219adda
font_01_sfnt_off0001016c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1016C 17064 bytes
SHA-256: 29aa483df5d77517651c99acd14a60af2ae9dccfe3283f67d0e315bfa1f5e47f
font_02_sfnt_off00012dd9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12DD9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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