Malicious PDF — malware analysis report

Static analysis result for SHA-256 d178fcd74efdcab1…

MALICIOUS

PDF

72.0 KB Created: 2021-07-01 15:05:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: b35ed01f796495269b93fb84d284cb30 SHA-1: a81c33ac6cc4e8d823ae2fb1aa48a55570a8222b SHA-256: d178fcd74efdcab1c1259a4021f2ea1121a210fba687ea5a1d5959b099c88dcd
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document was flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier as malicious. It contains numerous external URIs and link farms pointing to compromised WordPress sites and disposable hosting, suggesting a phishing or malware distribution attempt. No scripts were extracted, but the structure and URL patterns are indicative of a malicious PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9965

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://oniceh.ru/uplcv?utm_term=on+the+rock+where+moses+stood PDF link annotation
    • https://www.travelticket.com.au/wp-content/plugins/super-forms/uploads/php/files/6tt76ajbl95u9klmu6clb74e40/87487041915.pdfIn PDF document text
    • https://xn--80aaa1anac6cg.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/23e38501fdeeeb5a693d42ff67bd8ef7/99312196197.pdfIn PDF document text
    • https://belgradenightlife.info/wp-content/plugins/super-forms/uploads/php/files/jnc5662aijasrbfj1jqpdoli5i/33447128612.pdfIn PDF document text
    • https://lawrenceyezersky.com/userfiles/file/pulonudoga.pdfIn PDF document text
    • https://tucsonhomewindowtint.com/wp-content/plugins/super-forms/uploads/php/files/90b0c9b2bccf14b62b6d99544ed354dc/93477266877.pdfIn PDF document text
    • http://musorcentrum.hu/files/article/file/megiwepejowe.pdfIn PDF document text
    • https://greshamgilessalon.com/wp-content/plugins/super-forms/uploads/php/files/a512d130105090997585cf07c9fecb0b/bifulakemiz.pdfIn PDF document text
    • https://zabulgaria.org/userfiles/file/wejiwozijutatiz.pdfIn PDF document text
    • http://angelojrobles.com/admin_initial_test/userfiles/file/mitopewijowefaz.pdfIn PDF document text
    • http://oio.cn/uploadfiles/files/57978339684.pdfIn PDF document text
    • http://karunb.com/UpLoads/files/maxuwaxotofasekojudiru.pdfIn PDF document text
    • http://www.gaviprintpack.com/wp-content/plugins/formcraft/file-upload/server/content/files/160845a55b1895---sajaramonodaxedevi.pdfIn PDF document text
    • https://hashtag.school/userfiles/file/muwevikimatuzuzenevedabus.pdfIn PDF document text
    • http://asiavent.com/UserFiles/file///16653359705.pdfIn PDF document text
    • https://cleaner.pl/userfiles/file/rikodefavovevozifonijixel.pdfIn PDF document text
    • https://www.guestquesttravelmedia.com/wp-content/plugins/super-forms/uploads/php/files/tuq1kgposfd8ka8rqb8k60fahh/bujugezoxujivaka.pdfIn PDF document text
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/1606d69f85dea5---8590957767.pdfIn PDF document text
    • https://cristalensi.com/public/File/73552400045.pdfIn PDF document text
    • http://xn--b1ahhafccpgkb2bxo.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/84ffaadaaefdde3dca480b058da74e70/zivuxibibapujevuxoxi.pdfIn PDF document text
    • https://jaunimodienos.lt/wp-content/plugins/super-forms/uploads/php/files/lljpt451arqu88l9mvvdk1e6if/68377237457.pdfIn PDF document text
    • https://www.brunosistemi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a441872bf6d---remosakopa.pdfIn PDF document text
    • http://www.uvhk.com/wp-content/plugins/formcraft/file-upload/server/content/files/160971c10a3b8e---xexukunefovadari.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_off0000b81a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB81A 16260 bytes
SHA-256: f384c368c2007e98350ad1aa764f5deb9706877578607e8a5c017b270e2f0577
font_01_sfnt_off0000e2d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2D8 10536 bytes
SHA-256: 68ce9fdd0dfe5b6036cf3f8dc86ea1de7383a61f8473d75f86e9801effa7e1e9
font_02_sfnt_off0000fac7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAC7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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