Malicious PDF — malware analysis report

Static analysis result for SHA-256 602dfbd26ee89ab3…

MALICIOUS

PDF

78.7 KB Created: 2021-07-15 20:34:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: dc4f1dac45625ab03b97b2627a07e795 SHA-1: 7986c27362eb17f83686716ed9b2d8bf7ddf6c5a SHA-256: 602dfbd26ee89ab33af6aad7a43324eb48f80ef5e1b877c48ac1957ac430f1e8
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links pointing to compromised WordPress sites, identified as a link farm. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware distribution. While no scripts were directly extracted, the PDF structure and embedded URLs suggest it's designed to lure users to external malicious resources.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9833

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://www.birdandwildlifeteam.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bfbe6ad861e---254934083.pdf In PDF document text
    • http://www.holzbau-hoelzl.at/wp-content/plugins/formcraft/file-upload/server/content/files/160d4f5a913c4f---39880512236.pdfIn PDF document text
    • https://www.mercedesbenzofaustinservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608a1dfb94fdf---jabaxapilemig.pdfIn PDF document text
    • https://assurancemauricie.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608062c4169d8---suwifowipeme.pdfIn PDF document text
    • http://keacg.com/upload/files/jisovinenusapamawonim.pdfIn PDF document text
    • http://aarogyamedico.com/userfiles/file/meremenukanekefazeputul.pdfIn PDF document text
    • https://salvamontbihor.ro/app/webroot/files/userfiles/files/vakadaninufi.pdfIn PDF document text
    • http://baigeleather.com/userfiles/file/juwonesini.pdfIn PDF document text
    • http://www.mustwalge.ee/data/content/files/63498722718.pdfIn PDF document text
    • http://triumphtoday.org/wp-content/plugins/formcraft/file-upload/server/content/files/160ac06bea0716---79500317959.pdfIn PDF document text
    • http://www.linkkorea.co.kr/wp-content/plugins/formcraft/file-upload/server/content/files/160e5d25e82ee5---29059219619.pdfIn PDF document text
    • https://flylights.pl/wp-content/plugins/super-forms/uploads/php/files/18v2gk1nf6uark8allb8fpt7cg/nemakobekapififutig.pdfIn PDF document text
    • http://pappteam.hu/userfiles/file/74792494127.pdfIn PDF document text
    • http://subventionsbetrug.de/wp-content/plugins/super-forms/uploads/php/files/9p9fvhqim0a16sroho9pl6fufn/56548914805.pdfIn PDF document text
    • http://www.guaitoli.eng.br/wp-content/plugins/formcraft/file-upload/server/content/files/1608fa21745ec3---girasulo.pdfIn PDF document text
    • http://omniatel.it/wp-content/plugins/formcraft/file-upload/server/content/files/160996d835ec3b---34102117185.pdfIn PDF document text
    • https://cms.blauraum.com/wp-content/plugins/super-forms/uploads/php/files/df4e82f5797b77945e5e9aa563cb51d0/1147504946.pdfIn PDF document text
    • https://jnfarley.com/wp-content/plugins/super-forms/uploads/php/files/kvor8jdistg0jp788iihihoum3/42125434691.pdfIn PDF document text
    • http://www.zav-mito.si/wp-content/plugins/formcraft/file-upload/server/content/files/16071d36b82354---12729722798.pdfIn PDF document text
    • https://vinisfarm.com/wp-content/plugins/super-forms/uploads/php/files/57f5d843fba96f329f53a99299e5d4c1/sejiwojujo.pdfIn PDF document text
    • http://grani-tonkogo-mira.ru/wp-content/plugins/super-forms/uploads/php/files/2fb35c91558e9efbde1b123b734b2168/roxeb.pdfIn PDF document text
    • http://foire-fromages-et-vins.com/wp-content/plugins/formcraft/file-upload/server/content/files/16079be60bf343---jovefasafiravuxofasumufaz.pdfIn PDF document text
    • http://aranykoronakft.hu/userfiles/file/69474030976.pdfIn PDF document text
    • http://inlikeflintlogistics.com/wp-content/plugins/formcraft/file-upload/server/content/files/16078316579c03---xazobutizuzajeta.pdfIn PDF document text
    • http://plenaadoracao.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160843206908e5---vegikin.pdfIn PDF document text
    • http://alexlunacoach.com/img/editor/file/44353411212.pdfIn PDF document text
    • http://snookerfootball.eu/wp-content/plugins/formcraft/file-upload/server/content/files/1606cac3399321---92656271399.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3CAf4wW3hvY/uplcv?utm_term=write+an+equation+of+the+line+passing+through+the+given+point+that+is+parallel+to+the+given+linePDF 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cd6a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD6A 10940 bytes
SHA-256: b84d42d147796966bd915d653df28bb65338290eab43943247b1c01eb6767ddd
font_01_sfnt_off0000e668.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE668 17244 bytes
SHA-256: 8f2b4a3bf23f80a11328fa8a3660db88db25c86fdf06b73c65d66906b15a6e47
font_02_sfnt_off000113de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x113DE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1