Malicious PDF — malware analysis report

Static analysis result for SHA-256 d0bec364bde7747c…

MALICIOUS

PDF

70.8 KB Created: 2021-09-07 18:16:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 060b96129fe2f1f16e4f7783469772b0 SHA-1: 8fde76553e9f507a7aa4a226f3c1f455e60f08ff SHA-256: d0bec364bde7747ca71f5ce462de43b93481ddef059aafcaa3d9e31ed3322a69
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as Pdf.Phishing.Trojan. The file contains numerous links pointing to compromised CMS upload storage and disposable hosting, suggesting it's part of a link farm designed to redirect users to malicious sites. The presence of these links indicates an attempt to exploit users through phishing or to deliver further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9950

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://allseasonsart.com/uploads/fck_uploads/file/bokefagetixoseburaninujev.pdf In PDF document text
    • http://okmarin.ru/userfiles/file/78499922319.pdfIn PDF document text
    • http://www.kissdocs.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1608081a5d142c---zuwuvazefilubujufibavewa.pdfIn PDF document text
    • http://eprdel.cz/userfiles/file/risojawukikofubezuvat.pdfIn PDF document text
    • http://floridadressyourhome.com/uploaded_files/userfiles/files/85454753990.pdfIn PDF document text
    • http://www.gainerwindows.ca/wp-content/plugins/super-forms/uploads/php/files/og00rr2etpoeeqni6bf00mf0j0/41328516236.pdfIn PDF document text
    • https://www.baileysmilk.com/wp-content/plugins/super-forms/uploads/php/files/9605ecea6f723300d7a9436291b9b74f/fazirup.pdfIn PDF document text
    • http://www.sunaryem.com.tr/wp-content/plugins/super-forms/uploads/php/files/3q03peq71plosbuv20eq97j2t6/punivepo.pdfIn PDF document text
    • https://portsidestrategies.com/wp-content/plugins/super-forms/uploads/php/files/493a7be861977c574f413a09a1a6afa2/75396680299.pdfIn PDF document text
    • https://mission4recruitment.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075f8e8cd25c---zexoliwasolapuv.pdfIn PDF document text
    • https://uzmanwebci.com/calisma2/files/uploads/dorizanupinefomuvopujom.pdfIn PDF document text
    • https://dtcprojects.com.au/wp-content/plugins/super-forms/uploads/php/files/pm5qd2roo6l3l0mvvfhhe3oqv6/12926501681.pdfIn PDF document text
    • https://insights3.com/wp-content/plugins/super-forms/uploads/php/files/45ead3b8729b062ef1e38b3d844c7a49/34016001699.pdfIn PDF document text
    • https://comesa.com.pe/wp-content/plugins/super-forms/uploads/php/files/oqf0raqu0v19lrnlgqlkoqcma5/vefixajigetasomawik.pdfIn PDF document text
    • http://www.kzhep.in.ua/wp-content/plugins/super-forms/uploads/php/files/lah0us9hmc37pllegaot7jv436/10067090334.pdfIn PDF document text
    • https://jfefood.com/wp-content/plugins/super-forms/uploads/php/files/e8fb8d29c38e48e1915fd0c530a57565/5214839611.pdfIn PDF document text
    • https://ikima.fr/uploads/file/jevapobikibexemosodoviw.pdfIn PDF document text
    • http://www.atrium-tuiles.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e46da3114a---44309980776.pdfIn PDF document text
    • http://www.timtransportes.com/home/wp-content/plugins/formcraft/file-upload/server/content/files/1609c035c9d012---jilapumukifebiposatetesij.pdfIn PDF document text
    • http://aexpress.lv/index/images/up/file/88268544239.pdfIn PDF document text
    • http://passaicvalleyclassof1957.com/clients/44362/File/38799013368.pdfIn PDF document text
    • https://www.teppiche-waschen-hamburg.de/wp-content/plugins/formcraft/file-upload/server/content/files/16084aed2e1f83---66175259233.pdfIn PDF document text
    • http://innospectrum.eu/hirlevel/file/5447377534.pdfIn PDF document text
    • https://irisapp.cn/uploadfiles/fckeditor/20210801/file/16277581098933.pdfIn PDF document text
    • http://www.highlandmetals.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160710f62850b4---lorixoxebinategoxupafipi.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/ngfLrbzwjls/uplcv?utm_term=isms+27001+pdfPDF 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_off0000b5a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB5A2 16484 bytes
SHA-256: 0397c95a83db038b662052a8824716765b10c2d600bef5327524a8322e20e3e9
font_01_sfnt_off0000df80.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF80 10100 bytes
SHA-256: 6340facedc353df70b44eed749af1dbb3c6b65afba14f94afa053a0d5f973d94
font_02_sfnt_off0000f617.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF617 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1