Malicious PDF — malware analysis report

Static analysis result for SHA-256 fb2e19e817678ab0…

MALICIOUS

PDF

80.1 KB Created: 2021-09-15 23:54:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 68b2b04c07fb9b077cc33fe52ddd6255 SHA-1: b04ff2fd3ce2a9976123cd2ca024fcf31433cd7f SHA-256: fb2e19e817678ab0e7d4f0f1f0b9d37a0531a29489cde4d77a3121457b5ebd48
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs pointing to various domains, many of which appear to be compromised WordPress sites or disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. The heuristic PDF_SEO_DISPOSABLE_LINK_FARM suggests a link farm designed to redirect users, potentially to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

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://crysiq.ru/uplcv?utm_term=aashiq+awara+bollywood+movie+download PDF link annotation
    • http://haozuowenwang.com/imagefiles/file/jukavubuxotefedax.pdfIn PDF document text
    • http://www.nationaalgolfcongres.nl/wp-content/plugins/formcraft/file-upload/server/content/files/161340834e0908---78629973789.pdfIn PDF document text
    • https://www.grecosalesinternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613ba7819e250---47857469542.pdfIn PDF document text
    • http://balcimimarlik.com/resimler/files/junubalajenimeruruvi.pdfIn PDF document text
    • http://aajude.pt/backoffice/ckfinder/userfiles/files/navovivogok.pdfIn PDF document text
    • http://evaemlak.com/userfiles/file///lopokajovesepo.pdfIn PDF document text
    • http://gyndoktors.de/ckfinder/userfiles/files/xopuzapa.pdfIn PDF document text
    • http://woykoff.hu/upload/file/26811853080.pdfIn PDF document text
    • http://salonorganica.ru/upload/files/neganulizu.pdfIn PDF document text
    • http://theonejsc.com/userfiles/file/bokopekemutunuwag.pdfIn PDF document text
    • http://manuale.aziendasulweb.it/userfiles/files/nuvewozuro.pdfIn PDF document text
    • http://www.medical-psychology.gr/wp-content/plugins/formcraft/file-upload/server/content/files/16131cdfe0261a---8168416990.pdfIn PDF document text
    • http://robertoantoniz.com/resources/original/file/92081342324.pdfIn PDF document text
    • https://nexusmediation.nl/files/dozutitel.pdfIn PDF document text
    • https://resttour.com/images/userfiles/files/90771951934.pdfIn PDF document text
    • http://auburn-properties.com/userfiles/files/8323919032.pdfIn PDF document text
    • http://antasboru.com/guvennet/resimlerfiles/xatobojavifigedirubo.pdfIn PDF document text
    • https://inprovitpuertorico.com/ckfinder/userfiles/files/lesaviza.pdfIn PDF document text
    • http://aircond.md/upload_fck/file/19728553442.pdfIn PDF document text
    • http://kitpaisal.com/mypicture/file/xonudujop.pdfIn PDF document text
    • http://afghansolar.com/userfiles/file/bugopipolubaravevorezolo.pdfIn PDF document text
    • http://mrs-edu.com/sribati/editor/uploadfiles/fubenigarenopate.pdfIn PDF document text
    • http://www.xpresswedding.com/wp-content/plugins/formcraft/file-upload/server/content/files/16140cd66e8ee3---42368385297.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_off0000cef0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCEF0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e702.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE702 19488 bytes
SHA-256: 0cbda137ca02e75db4bc346af738a358f488e3f1400b03bfe3f57d8b0f17bfa7
font_02_sfnt_off000119c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x119C7 10948 bytes
SHA-256: 7a9706bf2ce785235738d8c29b44ddda15cba02db899b6386336e28531e73d9b