Malicious PDF — malware analysis report

Static analysis result for SHA-256 c204de58bbcf1a2a…

MALICIOUS

PDF

65.1 KB Created: 2021-09-21 06:50:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 03c897e0e96072a314315436e0a2779e SHA-1: 6d30a68e4dc3b90e157292e1d7968ef6906c0525 SHA-256: c204de58bbcf1a2a10365f763eaf78091889f38fa5d204c5414f8d53e06118ac
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a large number of embedded links, many of which point to compromised WordPress sites or disposable hosting. The ClamAV detection and ML classifier indicate malicious intent, likely for phishing or malware distribution. The heuristic PDF_RANDOM_URL_LINK specifically highlights a link to a suspicious PDF file, suggesting a multi-stage attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5438

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 to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • 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
  • 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://drafthe.ru/uplcv?utm_term=harmony+hub+shield+tv PDF link annotation
    • https://resonanceacteurs.nl/userfiles/file/92984539560.pdfIn PDF document text
    • http://www.farmaciabergua.com/userfiles/files/kajokitixigos.pdfIn PDF document text
    • http://lsphc.com/userfiles/file///sopixi.pdfIn PDF document text
    • https://dianthusindustrial.com/resimler/files/mevibijimitamaxomamedix.pdfIn PDF document text
    • https://wanfutemple.urwaydesign.com/data/file/userfiles/files/nitupufirujipopoko.pdfIn PDF document text
    • https://simplehome.ro/ckfinder/userfiles/files/soforulax.pdfIn PDF document text
    • http://hoanggiaphatland.com/uploads/image/files/74917105463.pdfIn PDF document text
    • http://audiomaster.se/wp-content/plugins/formcraft/file-upload/server/content/files/1613fb22dcf396---64341136681.pdfIn PDF document text
    • https://limpiezasinasel.com/userfiles/files/65143171649.pdfIn PDF document text
    • http://tramtronbetong.com/uploads/userfiles/file/43532283131.pdfIn PDF document text
    • http://studioingegneriavaragnolo.com/userfiles/files/71711653189.pdfIn PDF document text
    • http://sieuthimaynhapkhau.com/upload/files/xelipemezezesi.pdfIn PDF document text
    • https://guineaservicesproviders.com/gsp/files/zojenaruv.pdfIn PDF document text
    • https://299-45.com/CKEdit/upload/files/50818074482.pdfIn PDF document text
    • http://www.hj-bouwt.be/wp-content/plugins/formcraft/file-upload/server/content/files/16148206e7ffa5---92709437400.pdfIn PDF document text
    • https://brothers-music.com/ckfinder/userfiles/files/lusowakuvadeletumana.pdfIn PDF document text
    • http://wgadget.com/file_media/file_image/file/jevarufopil.pdfIn PDF document text
    • http://admio.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16138283705d89---wuniwi.pdfIn PDF document text
    • http://www.juniorcollege.cl/ckfinder/userfiles/files/76454217009.pdfIn PDF document text
    • https://ofcourselc.com/admin/uploadsfile/26195351289.pdfIn PDF document text
    • http://avision-italia.com/userfiles/files/tokevitufunidi.pdfIn PDF document text
    • https://marwaservicecenter.com/nbloom/fckuploads/file/lesafedeketuxovokuvot.pdfIn PDF document text
    • https://coverline.ro/userfiles/file/refubusazubetole.pdfIn PDF document text
    • http://dorrstrechy.cz/UserFiles/File/bubefigemiveloxumupedop.pdfIn PDF document text
    • http://polskienarty.pl/data/aktualnosci_imgs/file/katupejusogasaf.pdfIn PDF document text
    • http://3asoft.vn/img/files/liniduliworewam.pdfIn PDF document text
    • http://www.sunarnuricomuisvealisverismerkezi.com/wp-content/plugins/super-forms/uploads/php/files/q4r8kfjpdegnkh64sb156rmq53/20308902762.pdfIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000de50.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE50 10924 bytes
SHA-256: 4514345f48dec7a53ab02b9b3c0ed709bfd8aae317397376c97eafe71f48e0ec