Malicious PDF — malware analysis report

Static analysis result for SHA-256 0a13038e09617b45…

MALICIOUS

PDF

91.5 KB Created: 2021-09-17 05:32:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: e4ec34e6460e6ff48cde11dcf8f829a7 SHA-1: 58833671bd0887f2780d3a2d0718f4236ab7b306 SHA-256: 0a13038e09617b45b8d296edd1a18abf2a4e54f92206f961796660ec4a6802dd
156 Risk Score

Malware Insights

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

The PDF contains numerous links to external websites, many of which are hosted on compromised WordPress sites or disposable domains, indicating a link farm designed to distribute malicious content or phish users. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware delivery via these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9910

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://crysiq.ru/uplcv?utm_term=extreme+rally+suv+simulator+3d+mod+apk PDF link annotation
    • http://filipdegreef.be/uploads/files/mamanone.pdfIn PDF document text
    • http://pmdrecycling.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612eaa42d1338---xusubijamepor.pdfIn PDF document text
    • http://www.cpiequipos.com/assets/images/user_files/files/tafaduvijuviwa.pdfIn PDF document text
    • https://butterfly-propertymanagement.com/userfiles/file/92014267018.pdfIn PDF document text
    • http://poptheme.cn/uploadfile/files/20210915_235102.pdfIn PDF document text
    • http://www.vinoplaza.nl/img/upload/files/gosobumigidawodejufetemul.pdfIn PDF document text
    • https://sidexsideaudio.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613d3350c3060---gulilar.pdfIn PDF document text
    • http://itnetworkconsultingsf.com/helpdesk/app/webroot/img/userfiles/files/livununutasepadod.pdfIn PDF document text
    • http://beetsom.com/PROGRAM_FCKeditor_UserFiles/file/16686616086135184da599c.pdfIn PDF document text
    • https://comodee.com/wp-content/plugins/formcraft/file-upload/server/content/files/161436f005f37e---dedipekakebisob.pdfIn PDF document text
    • https://beautifulhairstore.com/upload/files/zikigazijedolekoxa.pdfIn PDF document text
    • http://www.39koratmachinery.com/file_upload/files/47138234125.pdfIn PDF document text
    • https://saint-florentin.charcutier-traiteur.fr/ckfinder/userfiles/files/82764183564.pdfIn PDF document text
    • http://csptech.net/admin/userfiles/file/96887231852.pdfIn PDF document text
    • https://inwestorfinanse.pl/userfiles/file/suzivotidew.pdfIn PDF document text
    • http://hasdeu.md/data/userfiles/files/puweliwovobemi.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614300b08d18f---886628382.pdfIn PDF document text
    • https://masukpt1.com/contents/files/62653082410.pdfIn PDF document text
    • http://casadiriposomarsala.it/userfiles/files/tesazaxelakesesevisipolef.pdfIn PDF document text
    • https://flylights.pl/wp-content/plugins/super-forms/uploads/php/files/jccgj3b7vq75llmv84fc3kus9n/gidebetefelomurezu.pdfIn PDF document text
    • http://xn--80akij1ajew.xn--p1ai/wp-content/plugins/formcraft/file-upload/server/content/files/16142c7bcab8ef---rawenujuwon.pdfIn PDF document text
    • http://lokalsport.no/userfiles/file/81603908909.pdfIn PDF document text
    • https://rivieresoceanie.com/userfiles/file/wefubejarokediwanafebeba.pdfIn PDF document text
    • http://busankid.com/webfiles/board/file///kajujapesajibik.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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d227.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD227 11080 bytes
SHA-256: 37aff97f5ce882c5b68ac18052b0218dd2b16c557b15c30ab47a51d165a927f5
font_01_sfnt_off0000ec1b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC1B 16496 bytes
SHA-256: 3ac5836961eefe1026e0f67361b72d4f2ed14c2f659334fcf23cb3cbc56fecbe
font_02_sfnt_off0001032c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1032C 24236 bytes
SHA-256: da976490067aa98d8581d6dfc488acb71be5a6de977caa777e6ccdca15a3fcc1
font_03_sfnt_off00013de4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13DE4 1820 bytes
SHA-256: ef4c56b83544acc0eae329b123dcb13384a4443b8ee25b6b011fcec9f25c534c
font_04_sfnt_off0001466e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1466E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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