Malicious PDF — malware analysis report

Static analysis result for SHA-256 6e811fd87f61b1c0…

MALICIOUS

PDF

70.8 KB Created: 2021-08-30 03:14:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 6b2a55da0c6a12d533fdd45b22fc0475 SHA-1: 22aa2fd166fbe0e9d1db32b0583b6d9ca7d39ee4 SHA-256: 6e811fd87f61b1c0af756b8ecf057523435f3970fa49dd5865f31a1ab20dd0e9
156 Risk Score

Malware Insights

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

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and a machine learning classifier indicated a high probability of maliciousness. It functions as a link farm, containing numerous URLs pointing to compromised WordPress sites and other disposable hosting, suggesting an attempt to redirect users to malicious content. The presence of these links and the overall structure strongly indicate a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://pixomot.ru/uplcv?utm_term=sarcolemma+in+smooth+muscle PDF link annotation
    • https://procogs.com/FCKeditor/file/33080745017.pdfIn PDF document text
    • https://senzedigicraft.com/wp-content/plugins/super-forms/uploads/php/files/ed2fe06b41a8c3d344b31d0fab2f47ec/gejik.pdfIn PDF document text
    • https://janeunchained.com/wp-content/plugins/super-forms/uploads/php/files/nqe9pc1c26trfegvjmn93e6ps1/xenojerim.pdfIn PDF document text
    • http://nadiadsa.org/userfiles/file/37464827205.pdfIn PDF document text
    • https://aartipalette.com/userfiles/file/67217108749.pdfIn PDF document text
    • https://erdemlerkoleji.com/resimler/files/vonudiwugajetoberavevus.pdfIn PDF document text
    • http://przedszkolenisko.pl/userfiles/file/laguj.pdfIn PDF document text
    • http://audiencefertilization.com/fckeditor/editor/filemanager/connectors/php/userfiles/file/41652641830.pdfIn PDF document text
    • http://unnatiwelfareorganization.com/ckfinder/userfiles/files/balusogovuvazad.pdfIn PDF document text
    • http://nsdadventist.org/FCKData/file/57937776497.pdfIn PDF document text
    • http://www.deadclan.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1610409bd0c6b3---pevad.pdfIn PDF document text
    • http://alltechsro.cz/files/26512665923.pdfIn PDF document text
    • https://heritagelogs.com/wp-content/plugins/super-forms/uploads/php/files/ldo2vgk0b62qggjbmrpfg48343/kapuxozokuxawu.pdfIn PDF document text
    • https://zabulgaria.org/userfiles/file/80263951068.pdfIn PDF document text
    • https://idfusionllc.com/wp-content/plugins/super-forms/uploads/php/files/a32e696bdb8b336c2b44bc66183c9f8e/sejuraledazubemamenagip.pdfIn PDF document text
    • http://www.derbysignandgraphics.com/uploads/file/tegukuxomudejapuvanu.pdfIn PDF document text
    • https://1sis.com/wp-content/plugins/formcraft/file-upload/server/content/files/160fb928d464db---rodosorolujuwikesija.pdfIn PDF document text
    • http://okna-dvere-online.cz/media/upload/upload/file/93191237168.pdfIn PDF document text
    • http://fabrykakonwersji.pl/wp-content/plugins/super-forms/uploads/php/files/4d1424486704166ede3f945252ed4181/53021773919.pdfIn PDF document text
    • http://osc-pribor.ru/products_pictures/file/wudogaj.pdfIn PDF document text
    • http://rockhousemethod.com/ckfinder/userfiles/files/mefibu.pdfIn PDF document text
    • https://bursaceviritercume.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a2ff4e34f5f---21948198438.pdfIn PDF document text
    • http://longearedhounds.com/clients/65743/File/bezoxagasuw.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b76d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB76D 15108 bytes
SHA-256: f5582aee5eec64dc99aa7df1783989870308ba1018489f1c026a5e9338f4968b
font_01_sfnt_off0000ddbc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDBC 10672 bytes
SHA-256: 2d6de4f374030bb43288fd51fe44f8be471952add84aa2fad6c0749ae28a3f05
font_02_sfnt_off0000f5fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5FB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.