Malicious PDF — malware analysis report

Static analysis result for SHA-256 3d27c616494be9d2…

MALICIOUS

PDF

113.0 KB Created: 2021-08-05 05:50:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 5ee424825f76c579fd626d47d284dbca SHA-1: 24c9c528e0a10c4340ac97ade7b18a4963fadd8a SHA-256: 3d27c616494be9d227bd0ba562f27d157a599dc90b265242d6f7b8e8179b3d2b
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier as malicious. It contains numerous links, many pointing to compromised WordPress sites and disposable hosting, indicating a link farm designed to redirect users to malicious content. The presence of embedded URLs and the nature of the link farm suggest an attempt to distribute phishing content or malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

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://www.itbaloch.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f8b2a5d4be3---nefalolaligevebabedavi.pdf In PDF document text
    • http://xn--80ackbssfuieecff0e8c.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/tv468o413m963ti2bt4153iu23/ninefilotufexoxuvutazo.pdfIn PDF document text
    • http://gps-tw.com/CKEdit/upload/files/20549551224.pdfIn PDF document text
    • https://ropaalmayoreo.com/images/userfiles/file/70320158869.pdfIn PDF document text
    • https://loan-financial.com/wp-content/plugins/super-forms/uploads/php/files/3c5c55ec490d07e28299f7e9c8740fb4/tenevabimopumexuzilu.pdfIn PDF document text
    • http://www.almansori-ye.com/almansorifiles/files/kaxuxix.pdfIn PDF document text
    • http://zulassungsservice4you.de/bilder/file/zalozaradarakoboz.pdfIn PDF document text
    • https://prosegik.com/wp-content/plugins/super-forms/uploads/php/files/581a43e66bceb0347d0ff9050b183ce2/gasutapujaw.pdfIn PDF document text
    • http://www.ebsjosepirosamaria.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072968772b40---gepogedi.pdfIn PDF document text
    • https://camping-du-lac-dijon.com/fichiers/60689294547.pdfIn PDF document text
    • https://ag-concept.ru/wp-content/plugins/super-forms/uploads/php/files/c8bdcd2091cb965e77974a7026ddfec3/10592625274.pdfIn PDF document text
    • http://fabrykakonwersji.pl/wp-content/plugins/super-forms/uploads/php/files/bbc77910413f3044b66a690426d434d3/mufajebo.pdfIn PDF document text
    • http://ncabhsa.com/clients/875427/File/liwobewugojutex.pdfIn PDF document text
    • http://mijneigenlift.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16072f1a89d44a---nawunerovekaloronolagik.pdfIn PDF document text
    • https://catwalkdogcome.com/editor_upload_image/file/dudikobegaziritodofirona.pdfIn PDF document text
    • https://traveltokiev.com/wp-content/plugins/super-forms/uploads/php/files/i8qfpnd1tdd2kvmd6ts1nm3ag5/25389411167.pdfIn PDF document text
    • http://hndgyl.com/v15/Upload/file/2021627556404540.pdfIn PDF document text
    • http://suportti.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609c282325e1d---disajapixarabirovifaxuw.pdfIn PDF document text
    • https://izharfoster.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e76f2a1ca9d---bixegufabewezisujobirumi.pdfIn PDF document text
    • http://cimkezes.hu/uploads/ckfinder/userfiles/files/10020482467.pdfIn PDF document text
    • http://brodart01.com/wp-content/plugins/super-forms/uploads/php/files/qt0pb2fnk4e94033r70ljmda43/pajubolaruxuz.pdfIn PDF document text
    • http://www.driftime.ee/wp-content/plugins/formcraft/file-upload/server/content/files/1607f13e0b4c89---todapodifoba.pdfIn PDF document text
    • http://cartonwrappingmachine.com/userfiles/file/voxafunosorigafurarozam.pdfIn PDF document text
    • https://gservicepz.com/wp-content/plugins/super-forms/uploads/php/files/112b9dcb68e01d70477759bdb8d98b50/32116791727.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/GLLx1DTH0VQ/uplcv?utm_term=binomios+al+cubo+ejercicios+resueltosPDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001376a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1376A 20772 bytes
SHA-256: 2e3bd338447e0c2f94de36e2791988aac91308fb59f0debaa9c333ea19ea2a79
font_01_sfnt_off00016d57.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16D57 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001856e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1856E 10812 bytes
SHA-256: 194707fc4073a04f12f19af000786299f7037310321d22ba469af4a8991bde60
font_03_sfnt_off00019e58.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19E58 16088 bytes
SHA-256: 450eea5fc67953cc3bdc764260aa6f1739571c17331c9588074966c3dbef4c6c