Malicious PDF — malware analysis report

Static analysis result for SHA-256 362bb9c227d1f71f…

MALICIOUS

PDF

81.1 KB Created: 2021-07-20 16:15:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: d44453ab954568d24087670b9196c6a4 SHA-1: 668bdd8c7dcb797de7a5e7f879e0dec44b08b78f SHA-256: 362bb9c227d1f71f525f09d4f8e2fc9cd399768ef2b88cdd1620c899ac9e58ca
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged as malicious by ML classifiers and ClamAV. It contains a link farm pointing to multiple compromised WordPress sites, likely intended to trick users into downloading further malicious content. The presence of embedded URLs and the nature of the heuristics suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9949

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://www.saraviation.com/wp-content/plugins/formcraft/file-upload/server/content/files/16076926b0a166---59421839132.pdf In PDF document text
    • http://proxima-design.cz/files/file/fenanovitimuvagifuru.pdfIn PDF document text
    • http://smart.sut.ac.th/tsme/src/lib/ckfinder/userfiles/files/gagog.pdfIn PDF document text
    • https://aadhaarretail.com/administrator/imagetemp/file/30944777019.pdfIn PDF document text
    • https://gamletaarnhuset.no/wp-content/plugins/formcraft/file-upload/server/content/files/16090c6dde51e6---31466893875.pdfIn PDF document text
    • http://kaupa.cz/userfiles/file/soxujusibisu.pdfIn PDF document text
    • http://adabaskimerkezi.com/upload/file/68366320170.pdfIn PDF document text
    • http://lapenya.cat/imgjovesnaves/file/jonisovu.pdfIn PDF document text
    • http://vetcasatenovo.it/userfiles/files/12324546412.pdfIn PDF document text
    • http://www.k-24.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bea4e2ddec2---vunazavazefepunatuf.pdfIn PDF document text
    • https://sweetestspaparty.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c304c48348---58565366737.pdfIn PDF document text
    • http://zionhillfirstbaptistchurch.com/clients/73368/File/tiremosu.pdfIn PDF document text
    • https://www.lang-mayer.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607cf5bad0627---9683286805.pdfIn PDF document text
    • https://xn--80aaaglcftt5alesfkk7f.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/fc40258058abc4fae02ce2f99e62b425/29307824450.pdfIn PDF document text
    • http://www.benvenutialmare.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609fbd7d09f1e---99139001753.pdfIn PDF document text
    • http://grawerlik.pl/userfiles/file/zifikixoxifimuvazagafo.pdfIn PDF document text
    • http://ahrestygz.com/userfiles/files/20210714_132907.pdfIn PDF document text
    • https://stopserv.ru/files/file/zisoxomaxiwufas.pdfIn PDF document text
    • https://cashofferoregon.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609859be70a97---lekejibinamofuzoniba.pdfIn PDF document text
    • https://suhrsmad.dk/wp-content/plugins/formcraft/file-upload/server/content/files/160982b505d20f---bogekofipovi.pdfIn PDF document text
    • http://ontheedgeofnow.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607172182b642---worapiwabezenigaberu.pdfIn PDF document text
    • http://nusamulticentralestari.com/Uploads/userfiles/files/fodagomarededu.pdfIn PDF document text
    • https://asiaviews.org/wp-content/plugins/super-forms/uploads/php/files/f2d9srj3f5pha532f0a7tt4vf7/45637868850.pdfIn PDF document text
    • https://www.reliancecareuk.com/wp-content/plugins/super-forms/uploads/php/files/faa1c44f8c51016c6cbd919e6e7b7207/69834175369.pdfIn PDF document text
    • https://ercrs.org/wp-content/plugins/super-forms/uploads/php/files/qomidhjpc3uffe7f0egjqcq4su/newofoxaselejaxoj.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/FevRqgeaUVY/uplcv?utm_term=increasing+indent+in+wordPDF 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_off0000d944.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD944 16932 bytes
SHA-256: 698ea8381837710e7e54c327d53f11745820b5e806ecab3985a7e19114651c4a
font_01_sfnt_off0001056e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1056E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011d85.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D85 10536 bytes
SHA-256: 777db49e90bec1caab5e536a35f5d567f5d18c465c3e02d439fe0bb4f09b4140

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