Malicious PDF — malware analysis report

Static analysis result for SHA-256 ed8e0f8814977cba…

MALICIOUS

PDF

166.3 KB Created: 2021-08-12 02:44:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 312416e32caf22b429e8fd29ba8506c7 SHA-1: e0f773d6396e4d5b640e5be105a4afc2dabc4f46 SHA-256: ed8e0f8814977cba94573a2eb33ebd6e9ebff798ff8b318c0874b1e307705d81
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF was flagged by ClamAV as a phishing trojan and ML classifiers indicated maliciousness. The heuristics indicate it functions as a password-protected archive lure, directing users to various external URLs, likely for phishing or malware delivery. The presence of embedded URLs and link farms suggests an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9727

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://pixomot.ru/uplcv?utm_term=como+liberar+un+verizon+a+telcel PDF link annotation
    • http://hamkr.com/userData/board/file/37794804805.pdfIn PDF document text
    • https://vashadvokat82.ru/wp-content/plugins/super-forms/uploads/php/files/28a245977338263c5275c7849ca08a76/64231923883.pdfIn PDF document text
    • http://gitishahjahanpur.org/ckfinder/userfiles/files/kuzufuzatagil.pdfIn PDF document text
    • http://www.socalgreatwhite.com/wp-content/plugins/formcraft/file-upload/server/content/files/160764a7fdb759---5382848342.pdfIn PDF document text
    • http://hondaototanan.com/upload/files/wufizibabibaredapuniri.pdfIn PDF document text
    • https://lcd96.ru/wp-content/plugins/super-forms/uploads/php/files/da11d7632eb0a2d506fe1465ed6291b0/97402303325.pdfIn PDF document text
    • https://www.nobleorthodontic.com/wp-content/plugins/super-forms/uploads/php/files/2777ad7c0ccf6206706c5d58b195d520/36138744166.pdfIn PDF document text
    • http://gulfcoolcontracting.com/uploads/userfiles/file/file/37417797864.pdfIn PDF document text
    • https://www.webhisto.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/16093c0386a921---firotipef.pdfIn PDF document text
    • http://www.rolstoellift.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a287ad1526e---vetutusilisujifozapok.pdfIn PDF document text
    • http://sanphamhanquocymy.com/uploads/files/zowaginamilikijij.pdfIn PDF document text
    • https://phoenixknights.co.uk/wp-content/plugins/super-forms/uploads/php/files/4f7940d8535b7a4ce8846f8e56eb0b4a/79007839387.pdfIn PDF document text
    • http://www.cheapmotorcycleinsurancepa.com/wp-content/plugins/super-forms/uploads/php/files/rsd734vpljpnrst3dp17c1jq47/98111496881.pdfIn PDF document text
    • https://egyiksem.hu/uploads/file/80418039000.pdfIn PDF document text
    • http://goksirkrupskimlyn.pl/img/upload/files/44057664677.pdfIn PDF document text
    • http://kperrylaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/93360689285.pdfIn PDF document text
    • http://www.theflightfest.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b9cbd4d6cbc---1523081652.pdfIn PDF document text
    • http://es-umzuege-transporte.de/wp-content/plugins/super-forms/uploads/php/files/6864c0bb0dafb8100d98c8d70c7c5d51/59957555888.pdfIn PDF document text
    • https://hmv.ir/wp-content/plugins/formcraft/file-upload/server/content/files/16087a6a47f7e8---29372933789.pdfIn PDF document text
    • http://bouncebodysupplements.com/newerac2c/userfiles/file/makusitu.pdfIn PDF document text
    • http://conwaychristian.org/wp-content/plugins/formcraft/file-upload/server/content/files/1607c2d4645340---66189750156.pdfIn PDF document text
    • https://enville.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b3a551d8a2f---kofezis.pdfIn PDF document text
    • https://israelonthehouse.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a7475516fc2---venesatokadidemegopumur.pdfIn PDF document text
    • https://wildarium.com/ckfinder/userfiles/files/losavonepilo.pdfIn PDF document text
    • http://saintthomasmonrovia.org/clients/a/a7/a774d5b45fc75aba9c6fcf07501e1e58/File/45277291905.pdfIn PDF document text
    • 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00020a6c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x20A6C 16764 bytes
SHA-256: da85250f3192bf7ed1a3bca3eb1c07ea1dcd4fb792acfbd947a4545582b8d72f
font_01_sfnt_off0002216f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2216F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00023986.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x23986 10620 bytes
SHA-256: 0efe60c4132ec980df2e6ec0895f83f8955c0b8bf53d649611eb8c72cc1ed04f
font_03_sfnt_off000251d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x251D1 22464 bytes
SHA-256: 098b96e8546a8092e619ce249ee6ea19de5ec5e832ff658172b7d56845a0c07a

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