Malicious PDF — malware analysis report

Static analysis result for SHA-256 978382422f9e743d…

MALICIOUS

PDF

95.7 KB Created: 2021-07-05 17:16:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 79b15cf89a1e5c850028cb3daabd992b SHA-1: d8eec84642a19270a799693c076a2aee75d584e7 SHA-256: 978382422f9e743dc14876583c449a53b8f842f510f74de9e7a87d1158f09e2c
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The heuristics reveal it functions as a link farm, directing users to multiple compromised WordPress upload sites and other disposable hosting domains. The primary goal appears to be to lure victims to these external sites, likely for phishing or further malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9936

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://digidatadecolombia.com/wp-content/plugins/super-forms/uploads/php/files/f2dbee2ae161e356f9cfc4c2c28eee6a/fenud.pdf In PDF document text
    • http://www.brennholz-heinlein.de/wp-content/plugins/formcraft/file-upload/server/content/files/160986276aa25f---26893580487.pdfIn PDF document text
    • http://vincentpopetutoring.com/clients/d/dd/dd6b7bcf94cac99d3bed97cf8166637b/File/19319128856.pdfIn PDF document text
    • http://wabasnb.com/files/fckeditor/file/87108153560cdbb52cea7e.pdfIn PDF document text
    • https://fedico.ca/upload/editor/file/84638679654.pdfIn PDF document text
    • http://anhuifan.com/upload_fck/file/2021-5-8/20210508191125153797.pdfIn PDF document text
    • http://soflcops.com/clients/83267/File/xopegesejuluvubudibupamaz.pdfIn PDF document text
    • https://www.hemoroidklinigi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607922ede5420---pegetuloxebonakazu.pdfIn PDF document text
    • https://govox.co.uk/wp-content/plugins/super-forms/uploads/php/files/unu3hhsn5h9furp9f4umn0l6p5/87421299906.pdfIn PDF document text
    • http://mdsalon.ru/img/lib/file/lewajelufosigag.pdfIn PDF document text
    • http://resetimpianti.it/reset/public/file/21910034684.pdfIn PDF document text
    • https://betalinktech.com/blmedia/file/tofunizutoremopitojojiruw.pdfIn PDF document text
    • https://belgradenightlife.info/wp-content/plugins/super-forms/uploads/php/files/hotndn8ot1q52hh571l79s7pga/65094053246.pdfIn PDF document text
    • http://akicgiyim.com/userfiles/file/nefofokuzuxofor.pdfIn PDF document text
    • https://medicinasolidale.org/wp-content/plugins/super-forms/uploads/php/files/f7b3f4f1671a8a9ff55185fff855fae0/gobepobanajetarazezifov.pdfIn PDF document text
    • http://commune-bourre.com/userfiles/file/44602442796.pdfIn PDF document text
    • https://www.colours-of.com/wp-content/plugins/super-forms/uploads/php/files/ilmhialle17gi1ctjmb5gvfojo/rakisasasovakitegode.pdfIn PDF document text
    • http://www.virtualaid.eu/wp-content/plugins/formcraft/file-upload/server/content/files/1608103cf17164---noxapovowelumubobural.pdfIn PDF document text
    • http://asesorgubernamental.com/images/file/pagepaboniv.pdfIn PDF document text
    • http://vtracauto.com/wp-content/plugins/formcraft/file-upload/server/content/files/16079c9d566eec---suruloveziz.pdfIn PDF document text
    • http://www.cascinasorigherio.it/wp-content/plugins/formcraft/file-upload/server/content/files/1609ad280ac066---50092073283.pdfIn PDF document text
    • http://softwarefactory.nl/images/file/wagujejemegimusuzisogaw.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/ngfLrbzwjls/uplcv?utm_term=sunset+oil+pastel+drawingPDF 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_off0000fa7e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA7E 18064 bytes
SHA-256: 35e4e6e60bdfe9e795dcd5f0e5146e2b240a370bffdba2eec016257ea8fefe43
font_01_sfnt_off00012a3e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12A3E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001424f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1424F 16232 bytes
SHA-256: efb53f6aa80441d00297d71bcb0dc7035781bf5fe741b67ce11c002f0845de40
font_03_sfnt_off00015837.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15837 10828 bytes
SHA-256: 7e4eb40490177de72ccdb3c85cdcae3016633d47e16bbe81ae6faf30788fe1e9

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