Malicious PDF — malware analysis report

Static analysis result for SHA-256 60baafccda3ba5bf…

MALICIOUS

PDF

74.6 KB Created: 2021-08-31 07:06:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: ed1a1712b0297bf486176696147bfe29 SHA-1: d2d7092be5e473abdaa586cf14a74e46d3fb8da9 SHA-256: 60baafccda3ba5bf2fd8426e7191078adbd4e8f0fafd8f21a4ea7e5d50f17e0d
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The file contains numerous external URIs and is identified as a link farm hosted on compromised WordPress sites, suggesting it is designed to redirect users to malicious content. The presence of embedded URLs and the nature of the heuristics point towards a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

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://ketchas.ru/uplcv?utm_term=5+types+of+myocardial+infarction PDF link annotation
    • http://cageart.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1611d180276695---13964063264.pdfIn PDF document text
    • https://vieclamhanoi247.com/upload/files/23977451770.pdfIn PDF document text
    • http://controlsystemco.com/cache/fck_files/file/kisopivumadimi.pdfIn PDF document text
    • http://sarahscupcakery.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f9ddccf185---23957842302.pdfIn PDF document text
    • https://www.sacda.org/wp-content/plugins/super-forms/uploads/php/files/3ao95t3jhh09q49fbk9o8acrm0/80016933582.pdfIn PDF document text
    • http://cosmikkino.ru/sadm_files/60601015227.pdfIn PDF document text
    • https://adsbudget.net/userfiles/file/mopivawozuzav.pdfIn PDF document text
    • http://aucoindeshalles.com/menu/file/77556977864.pdfIn PDF document text
    • https://www.lipfish.no/wp-content/plugins/formcraft/file-upload/server/content/files/160c0f6b9c7ef8---60256359749.pdfIn PDF document text
    • http://gsprojekt.eu/userfiles/files/fabefifamu.pdfIn PDF document text
    • http://www.myhhsi.com/wp-content/plugins/super-forms/uploads/php/files/cb042270145c9894faa1f44176b11352/39571932827.pdfIn PDF document text
    • http://pulsarvn.com/media/ftp/file/kuxitavara.pdfIn PDF document text
    • http://extrastyle.ee/ckfinder/userfiles/files/jizew.pdfIn PDF document text
    • http://cngwalk.com/fckeditor/userfiles/image/11418918590.pdfIn PDF document text
    • http://dzbnf.com/upload/file///xanika.pdfIn PDF document text
    • https://wyslijpaczki.pl/app/webroot/files/userfiles/file/92076492687.pdfIn PDF document text
    • http://cbcom.eu/ressource/site-image/files/64497407585.pdfIn PDF document text
    • https://searchlink.org/userfiles//file/zujate.pdfIn PDF document text
    • https://tripleccompanies.com/wp-content/plugins/super-forms/uploads/php/files/954cc3ff361102d5ffb022e986af1862/doren.pdfIn PDF document text
    • http://vervesimuhub.com/userfiles/file/wukoxawaraxifinizun.pdfIn PDF document text
    • http://jyjwqj.com/uploadfile/file///2021052211134429.pdfIn PDF document text
    • http://myphamlulanjina.com/upload/files/xatulisolepug.pdfIn PDF document text
    • https://daleplumbinginc.com/wp-content/plugins/super-forms/uploads/php/files/538a68d90a0025c4fe5cc51cc0cab222/81964673625.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_off0000c2d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC2D8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000daef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDAEF 10932 bytes
SHA-256: 5863b1eb11bf3571417c5659da541f58a30cee9a8e4ed6f1e5ea0bf2c56bd5b2
font_02_sfnt_off0000f449.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF449 16084 bytes
SHA-256: 0db9f89899a3a3d0efddbe6377e3eba151d792dbc69628a935dfff41686b638a

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