Malicious PDF — malware analysis report

Static analysis result for SHA-256 e6a246886059fab1…

MALICIOUS

PDF

87.2 KB Created: 2021-09-06 02:44:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 2559a7f1540152013f885478acc63aee SHA-1: 8ca512d5b4b7a4c5b8522f09cbfc92ab77ff05eb SHA-256: e6a246886059fab1553c27eeb11ab97986264b6792d82f459a6d43af7b8e71d8
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains numerous links to external resources, many of which are hosted on compromised WordPress sites and utilize formcraft plugins for file uploads. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. The presence of embedded URLs and the nature of the links suggest an attempt to redirect users to malicious content or download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9881

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://medvor.ru/uplcv?utm_term=reactor+design+for+chemical+engineers+pdf PDF link annotation
    • http://www.sevenchurchestour.net/seven/wp-content/plugins/formcraft/file-upload/server/content/files/160ac83887fc21---18740238793.pdfIn PDF document text
    • http://pereplanirovkaoblast.ru/pict/file/57284831778.pdfIn PDF document text
    • http://www.iso-clean.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160c9ad74373ed---11685930184.pdfIn PDF document text
    • https://www.elektrobetrieb-scholz.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608fb4cf4c729---70141823149.pdfIn PDF document text
    • http://valdhans.cz/userfiles/file/tabonuponanojexepibof.pdfIn PDF document text
    • http://pecsimutargygaleria.hu/files/file/2413514122.pdfIn PDF document text
    • https://dacoma.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1607a5b35d5f5f---93694387274.pdfIn PDF document text
    • https://www.rath-catering.de/wp-content/plugins/formcraft/file-upload/server/content/files/16088b2ee863c7---riroti.pdfIn PDF document text
    • http://umrllc.com/userfiles/files/magofuvilaze.pdfIn PDF document text
    • https://retentionstudentexperience.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d1619edb2c---54688475007.pdfIn PDF document text
    • http://www.socalgreatwhite.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f0a08353aa---14691295607.pdfIn PDF document text
    • http://www.infranetltd.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b78f5e24018---vuzexozeralu.pdfIn PDF document text
    • http://fairway.cc/images/blog//file/78612274112.pdfIn PDF document text
    • http://fotografiafrancescosomma.com/userfiles/files/sigerimusaxafum.pdfIn PDF document text
    • https://skyfireconsulting.com/wp-content/plugins/super-forms/uploads/php/files/e6tlfqs4htmma34v8d0jnaj7nd/woxegirokipivaranobo.pdfIn PDF document text
    • https://iqmuseum.mn/uploads/files/74578671784.pdfIn PDF document text
    • http://sosnovgeo.ru/userfiles/file/15954610268.pdfIn PDF document text
    • https://connect.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/d22f988912d34edc5c9b53054cd59d4d/xapojinatevoler.pdfIn PDF document text
    • https://amenagementsoleil.com/wp-content/plugins/formcraft/file-upload/server/content/files/160748046e174d---61101569673.pdfIn PDF document text
    • http://ceomit.com/fckupload/file/jesibutabupebasomurezida.pdfIn PDF document text
    • https://popcouncilinstitute.org/wp-content/plugins/super-forms/uploads/php/files/56211701404ea652318f47853bc714af/nanujigenad.pdfIn PDF document text
    • http://www.onegelha.com/wp-content/plugins/super-forms/uploads/php/files/ff92db462bc6435e439c79e47a166682/50248112344.pdfIn PDF document text
    • http://travelport.pl/userfiles//file/vifileligukasewuwarit.pdfIn PDF document text
    • http://olsztyntransportmedyczny.pl/userfiles/file/vametifogukisasafurutoz.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://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_off0000f441.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF441 16500 bytes
SHA-256: fc0c531dd2af50775cfb4d23fb26fe29758a951b421cbf007560554747212f80
font_01_sfnt_off00011f1b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F1B 11112 bytes
SHA-256: efc1aebeaf6562e59964c7e5139e0e677d7a60ea7d0feb7f6bdb26fc36f93231
font_02_sfnt_off0001389a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1389A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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