Malicious PDF — malware analysis report

Static analysis result for SHA-256 fbd474da024897a9…

MALICIOUS

PDF

97.0 KB Created: 2021-08-08 01:58:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 0dc751f73be3fa059bdde22b410797fe SHA-1: 2a9a2ca4694d0571f8d1a03074db61be6cc2178a SHA-256: fbd474da024897a9ce79fb90c29369d55912a14f5df68038e33549c10c4e5b0c
156 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs, many of which point to compromised WordPress sites. These URLs are likely part of a link farm designed to obscure the ultimate destination and evade detection. The ClamAV detection and ML classifier strongly indicate malicious intent, consistent with phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9969

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://oniceh.ru/uplcv?utm_term=united+states+government+our+democracy+student+edition+pdf PDF link annotation
    • http://www.mtpartnersfl.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608f04f7727f6---85133505210.pdfIn PDF document text
    • https://auf.vn/wp-content/plugins/super-forms/uploads/php/files/5bme1dri8t176kh469thfvr5o4/21166372572.pdfIn PDF document text
    • http://agenziadiviaggiocagliari.it/file/wonebe.pdfIn PDF document text
    • https://jodhpurtravels.com/nbloom/fckuploads/file/5468509648.pdfIn PDF document text
    • http://x-site.by/upload/editor/files/wamaveti.pdfIn PDF document text
    • http://ithaca1962.com/clients/41687/File/43934681704.pdfIn PDF document text
    • http://bpabv.nl/uploadfiles/file/70015367936.pdfIn PDF document text
    • http://abpaluso.com/upload/file/karifumutagizativiki.pdfIn PDF document text
    • https://thesmithgrouphouston.com/wp-content/plugins/super-forms/uploads/php/files/1c018b9fa58689d9a87f0e884ebb887d/labusemopadezujaz.pdfIn PDF document text
    • http://artmetinc.com/wp-content/plugins/formcraft/file-upload/server/content/files/16105bcd3ad28c---josatetubiweb.pdfIn PDF document text
    • http://93564497.com/userfiles/84705517968.pdfIn PDF document text
    • https://growmytruck.com/wp-content/plugins/super-forms/uploads/php/files/85dec6d3b0e879a8b0e5a01eebbe351c/zokobogibexexugaj.pdfIn PDF document text
    • https://adbadog.com/wp-content/plugins/super-forms/uploads/php/files/e721e8116710815753b8e233c47b16f9/59042198829.pdfIn PDF document text
    • http://wohingltd.com/userfiles/93975307626.pdfIn PDF document text
    • https://plumcourse.com/wp-content/plugins/super-forms/uploads/php/files/12e0c383e37c05b72103890c51dcfd16/sonuruzubezololefaxap.pdfIn PDF document text
    • http://iwilldoit.ru/uploads/files/files/sototemigomakagepufi.pdfIn PDF document text
    • https://stefandes.com/wp-content/plugins/formcraft/file-upload/server/content/files/16088a7d78b4b7---konukujuwarofelasalob.pdfIn PDF document text
    • http://www.fattyweng.com.sg/wp-content/plugins/formcraft/file-upload/server/content/files/16107172ee76c2---65406988852.pdfIn PDF document text
    • https://smoothnomad.com/wp-content/plugins/super-forms/uploads/php/files/b9num3otfb094pukn9afamed06/moperojesuper.pdfIn PDF document text
    • http://campfirewtx.org/userfiles/file/98554484156.pdfIn PDF document text
    • https://arizonapoolcontractor.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b41b1268ec9---67597108778.pdfIn PDF document text
    • http://mrbossamktown.com/uploads/files/63095946847.pdfIn PDF document text
    • http://artmetinc.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f98aec4cf5---likuxewotanudeb.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_off000114d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x114D0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00012ce2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12CE2 17936 bytes
SHA-256: bf934c1b3e015c4d4a48beb73f202c32fcc6c3afdf8bd69703967ab5fffe0450
font_02_sfnt_off00015bf2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15BF2 11204 bytes
SHA-256: b6bd26057f8179f13fbae9bb7cc353cb123e8004ff380209a90ac1377f91a90d

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