Malicious PDF — malware analysis report

Static analysis result for SHA-256 ba7eea5f91a0f33b…

MALICIOUS

PDF

108.7 KB Created: 2021-06-26 21:06:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: 849efbaf52d4b59ee3ff3ded0da19061 SHA-1: 46b1641dce4afd6663784f893cf9690c49f835d1 SHA-256: ba7eea5f91a0f33ba61f9c7c22fc1135a2b50d24ac7e36c8386226dcc8ef7ed8
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1055.012 Process Injection T1204.002 Malicious Link

The PDF contains numerous external links, many of which point to compromised WordPress sites, indicating a link farm designed to redirect users to potentially malicious content. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware distribution via these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9937

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://clair-environnement.eu/catalogue_dynamique/file/sabijezeseserefimiwefu.pdf In PDF document text
    • http://www.pianoszimmermann.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607914d24d858---moregasopofemowaxosufogoz.pdfIn PDF document text
    • https://daleel.global/wp-content/plugins/super-forms/uploads/php/files/pm9pbbrcjpl2j98i5c0sj9i5iv/68289510103.pdfIn PDF document text
    • http://drvision.org/wp-content/plugins/formcraft/file-upload/server/content/files/160930b770e5c3---87756735900.pdfIn PDF document text
    • https://journeypeople.cc/wp-content/plugins/super-forms/uploads/php/files/d576893ceb080d009667a3cfcf7b273c/26426754068.pdfIn PDF document text
    • https://extremetour74.ru/wp-content/plugins/super-forms/uploads/php/files/b6183feabfdb23f4202655bfdc814b41/witav.pdfIn PDF document text
    • http://baraanduliaptti.org/userfiles/file/vemomadulow.pdfIn PDF document text
    • https://www.elementstraining.co.uk/wp-content/plugins/super-forms/uploads/php/files/kp25kijhrcua0089m4foc18l5e/zuwarunaduzepeko.pdfIn PDF document text
    • http://israel-aliya.com/wp-content/plugins/super-forms/uploads/php/files/103fdfe26c1c2e4b3693363a06cef5f2/47777067990.pdfIn PDF document text
    • https://amartzon.store/wp-content/plugins/super-forms/uploads/php/files/90aa979e068b834c81598847bcb592eb/zuzuteluze.pdfIn PDF document text
    • http://easyreturn.store/userfiles/file/sikejovujeziponudepamu.pdfIn PDF document text
    • http://barrarioservicos.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160789b2f0b0be---senubo.pdfIn PDF document text
    • http://www.inhd.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a4c9660d4b8---16222042515.pdfIn PDF document text
    • http://boulderdivorcelaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c86d8e5c05d---mataposevufuvosejot.pdfIn PDF document text
    • https://skyfireconsulting.com/wp-content/plugins/super-forms/uploads/php/files/58ml5k9ek95dkaq7dulkl2egp6/93192167042.pdfIn PDF document text
    • https://getlovebooks.com/wp-content/plugins/super-forms/uploads/php/files/8249ec54754969d62002b83a91a65297/sogikivuxirorukoduzem.pdfIn PDF document text
    • http://au-coeur-du-temps.com/userfiles/file/fudagokuzepobanozovo.pdfIn PDF document text
    • http://asalsold.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cdf99546ce0---jovuzev.pdfIn PDF document text
    • http://pmdrecycling.com/wp-content/plugins/formcraft/file-upload/server/content/files/160999671b96c8---bakazigigolat.pdfIn PDF document text
    • http://www.champcaregivers.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d0fa993f7f---98309622672.pdfIn PDF document text
    • https://www.potterycommercials.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160ab3a0cb0d23---197715836.pdfIn PDF document text
    • https://cbolean.com/wp-content/plugins/super-forms/uploads/php/files/j98ke87ib76tgae58sk9eoetm0/49667058257.pdfIn PDF document text
    • http://chrisdepanneservices.fr/Sites/cds/files/lizutijijejikanikuwa.pdfIn PDF document text
    • https://sitebyside.ru/wp-content/plugins/super-forms/uploads/php/files/e58662a1186ca8b6838520171e00a354/44644703013.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/GLLx1DTH0VQ/uplcv?utm_term=problems+of+education+in+india+pdfPDF 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_off0001421d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1421D 11020 bytes
SHA-256: 84cadd660c1707c1e8ed761bf0ca9874b98bf86bec8833b66e47e88014532532
font_01_sfnt_off00015b81.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15B81 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00017393.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17393 18392 bytes
SHA-256: 6fb34dc26ced874066fc70de6272b04c0fd8a0f654047bb6dd7b559deb2dae00