Malicious PDF — malware analysis report

Static analysis result for SHA-256 1207ae75a2eddf53…

MALICIOUS

PDF

84.1 KB Created: 2021-06-28 03:11:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: 4328d7607a2a8eb49e9a86cf30dfab13 SHA-1: 803db0d64e2f9d1f05c61271192d8722ee50a545 SHA-256: 1207ae75a2eddf53e5629be9d8ba86baa26a2e7e00fc22dec457be4c75084e5f
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to compromised WordPress sites hosting further PDF files. Heuristics indicate this is a link farm designed to direct users to potentially malicious content. ClamAV detection and ML classification confirm the malicious nature of the file, likely serving as a lure for phishing or to distribute further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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://travels-ukraine.com/wp-content/plugins/formcraft/file-upload/server/content/files/16085c90f45956---64425524859.pdf In PDF document text
    • https://campermagazine.tv/public/file/sajolosezetavazorerekopuv.pdfIn PDF document text
    • https://www.pietri-automobiles.com/wp-content/plugins/super-forms/uploads/php/files/lk2b9dgf38sfmkrq1122n4soim/35421251561.pdfIn PDF document text
    • https://adlinefor.com/home/webagen/public_html/korn/data/file/sawixasamilinuviguji.pdfIn PDF document text
    • https://www.espymetcalf.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aa9c22bc70a---33295710161.pdfIn PDF document text
    • http://www.lbf-cosmetics.com/website/wp-content/plugins/formcraft/file-upload/server/content/files/160874de19e179---wikasofasobepodofopuxa.pdfIn PDF document text
    • http://aksaaydinlatma.com/img/editor/image/file/gowenapumatedazez.pdfIn PDF document text
    • https://wilsonbarrera.com/inicio/wp-content/plugins/formcraft/file-upload/server/content/files/1606e59fdd8c63---10079232546.pdfIn PDF document text
    • https://autoschiller.de/wp-content/plugins/formcraft/file-upload/server/content/files/16079a6ceda2af---bulizopiwegisevitareke.pdfIn PDF document text
    • https://storage-in-motion.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bd1737c5007---81169518057.pdfIn PDF document text
    • http://mysistermyfriendministries.org/clients/85776/File/bokix.pdfIn PDF document text
    • http://mygotour.com/FileData/ckfinder/files/20210619_B6C6F737C58D7ED7.pdfIn PDF document text
    • https://www.syah.org/wp-content/plugins/super-forms/uploads/php/files/a1c58da58970f4e55caceac7b508604f/nonipuvimaregizurob.pdfIn PDF document text
    • https://cleaner.pl/userfiles/file/loziritizelujibek.pdfIn PDF document text
    • http://sciencevier.com/wp-content/plugins/formcraft/file-upload/server/content/files/16086419ecde9d---ritusu.pdfIn PDF document text
    • https://414movement.com/wp-content/plugins/super-forms/uploads/php/files/25be657e57877064dc137ef5dc9a133f/77782114010.pdfIn PDF document text
    • http://atol-res.pl/uploads/file/6525617971.pdfIn PDF document text
    • http://xn--90ad5ackt1d.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/bb9a0538e463a896a6627911634efdda/75286188092.pdfIn PDF document text
    • http://alpanelektrik.com/depo/sayfaresim/file/givebirikeno.pdfIn PDF document text
    • http://skuplaptop.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160985efb61915---lozegoraruvu.pdfIn PDF document text
    • http://www.redactordecontenidos.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160b9a04da6489---fakovuv.pdfIn PDF document text
    • https://vicotelecom.vn/static/source/images/file/wudax.pdfIn PDF document text
    • https://genesisbehaviorcenter.com/wp-content/plugins/super-forms/uploads/php/files/7b10d3c8f0a3ecab31095f639e8c1f08/23690383408.pdfIn PDF document text
    • https://canadiancontractorservices.com/wp-content/plugins/super-forms/uploads/php/files/dmclr129gciik65l0odps9ovc2/46422369514.pdfIn PDF document text
    • http://middlegeorgiacoinclub.com/wp-content/plugins/formcraft/file-upload/server/content/files/160755e82ae0da---10698065036.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/cv9VXjIrmdE/uplcv?utm_term=easy+christmas+doodlesPDF 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_off0000e7a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7A1 10628 bytes
SHA-256: 5d7bb63adff3d9e07b5e49f944642988126467a62e2a382db622b6528d790bd4
font_01_sfnt_off0000fffe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFFE 16072 bytes
SHA-256: 68decd1abe2e8e85cf9aff1accb56461778a0c81a6bf2b144aa8eb5ef76bfd37
font_02_sfnt_off00012950.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12950 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1