Malicious PDF — malware analysis report

Static analysis result for SHA-256 72c414af3259417f…

MALICIOUS

PDF

92.5 KB Created: 2021-07-05 12:20:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: 045b9029b0511ffe965a3ccc03c062ab SHA-1: 8f6ed6c810430e24d505f1f8207113606ea0710a SHA-256: 72c414af3259417f77fa222dcf64e91dfe3f13f5b3094954901c5d6fd72fdb57
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and an ML classifier indicated a high probability of maliciousness. The document contains a link farm with numerous URLs pointing to compromised WordPress sites and disposable hosting, suggesting an attempt to redirect users to malicious content. While no scripts were explicitly extracted, the PDF structure and embedded links are indicative of a phishing or malware distribution lure, likely delivered via spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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://globalclassic.org/wp-content/plugins/super-forms/uploads/php/files/e4hek4do86fl32nio7onc3of6c/42281768159.pdf In PDF document text
    • http://intechsol.kz/wp-content/plugins/formcraft/file-upload/server/content/files/1608889674ebd5---42509320669.pdfIn PDF document text
    • https://lonnebacka.se/anvandarbilder/126/files/80736428457.pdfIn PDF document text
    • https://grandmake.com/userfiles/nogarizejaletawopof.pdfIn PDF document text
    • http://haumeaonline.com/userfiles/file/94469435750.pdfIn PDF document text
    • http://faisaltowel.com/survey/userfiles/files/59769189480.pdfIn PDF document text
    • https://dienlanhhonganh.com/images/pic/file/figunolawudoviwobi.pdfIn PDF document text
    • http://sarljarry.fr/userfiles/file/51795226893.pdfIn PDF document text
    • https://euroroma-bg.org/files/file/85067730422.pdfIn PDF document text
    • https://rffsev.ru/wp-content/plugins/super-forms/uploads/php/files/083f52ef3f52731d773c165a5f15f739/93793881810.pdfIn PDF document text
    • https://interesttour.com/wp-content/plugins/super-forms/uploads/php/files/0e4dd2c03175981cbb5fcd1cc6a2b2f1/66730930127.pdfIn PDF document text
    • http://musicpark-live.de/userfiles/file/dirofewajom.pdfIn PDF document text
    • http://arch-teh.com/pic/userfile/47073717824.pdfIn PDF document text
    • https://eandjfamilyhealthcenter.com/wp-content/plugins/super-forms/uploads/php/files/5963115088965b0a27b365d33fe722eb/54395994285.pdfIn PDF document text
    • http://xn--54-dlcdkamdj4btild5b.xn--p1ai/ckfinder/userfiles/files/82272362990.pdfIn PDF document text
    • https://www.tunnel.de/files/uploaded/file/4981046896.pdfIn PDF document text
    • http://agcslohian.com/userfiles/file/dexobifegegit.pdfIn PDF document text
    • http://abpaluso.com/upload/file/62963372225.pdfIn PDF document text
    • https://bursaceviritercume.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a41878dd13f---51265770438.pdfIn PDF document text
    • https://apexforestservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e95c222b6f---25541902834.pdfIn PDF document text
    • https://www.colours-of.com/wp-content/plugins/super-forms/uploads/php/files/fehbq51ju9t5btqhv5geqaok6l/xuliwuxufonubibomej.pdfIn PDF document text
    • https://www.lesson-online.org/wp-content/plugins/super-forms/uploads/php/files/eicc7fjpo4uuta5b21bq255pq1/4506067091.pdfIn PDF document text
    • http://www.loicadesacavem.pt/wp-content/plugins/formcraft/file-upload/server/content/files/160e098041263e---bogino.pdfIn PDF document text
    • http://luvnchrlysenglishtoys.com/clients/861429/File/94736616515.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3CAf4wW3hvY/uplcv?utm_term=what+was+the+bargain+of+1877PDF 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_off0001040e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1040E 17264 bytes
SHA-256: b2e17d478f54b481226fb455911cf2d15249b5d328342a03f6922140755430e4
font_01_sfnt_off00013157.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13157 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001496e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1496E 10976 bytes
SHA-256: e6ce13274486d5b83622ce66aa42f4ea7d76a3e116dac099966ee5133fb68080

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