Malicious PDF — malware analysis report

Static analysis result for SHA-256 44925203ab1a8e50…

MALICIOUS

PDF

90.1 KB Created: 2021-06-28 21:29:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: e93c69e8691c0c6a12440bb70dbdbbe2 SHA-1: 130df3224ed1cc6a50e6f9139913af9e3c7f0cd0 SHA-256: 44925203ab1a8e5009bbb5a91671173c0c1f1918846606bd78b23bf6b572a20f
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous embedded URLs, many of which point to compromised CMS upload directories or are part of a link farm hosted on disposable domains. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or distributing further malware. The primary attack pattern observed is the use of a link farm to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9835

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://anfauglir.com/images/file/99107051149.pdf In PDF document text
    • http://brette-animation.com/userfiles/file/14241366844.pdfIn PDF document text
    • https://functionalmovement.gr/wp-content/plugins/super-forms/uploads/php/files/b6def05875a77677a20082a919f7dca9/gibuz.pdfIn PDF document text
    • https://stefandes.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c015067c60e---30642932168.pdfIn PDF document text
    • https://grup-insaat.com/userfiles/file/pomixut.pdfIn PDF document text
    • https://rajakeempat.com/contents//files/dakusazamutowaronije.pdfIn PDF document text
    • http://gingerwooddesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607705691079b---juzixuze.pdfIn PDF document text
    • https://harpethvalleypto.org/wp-content/plugins/super-forms/uploads/php/files/84a551aa441f4bd3584758fe3d7d9e3c/dozibunusit.pdfIn PDF document text
    • http://www.misshandicap.ch/wp-content/plugins/formcraft/file-upload/server/content/files/1607e302d6de7e---92988320247.pdfIn PDF document text
    • http://fongyoskert.hu/userfiles/files/dagupumolaxexasadodane.pdfIn PDF document text
    • http://abpaluso.com/upload/file/kevaluj.pdfIn PDF document text
    • http://mko-yug.ru/wp-content/plugins/super-forms/uploads/php/files/2ae6553a1e7326a54b48f5af6ae84fff/lisaf.pdfIn PDF document text
    • http://pcwenhua.com/uploadimg/file/1623384592711412139.pdfIn PDF document text
    • https://www.frankreich-ferien.ch/wp-content/plugins/formcraft/file-upload/server/content/files/16098cb4bea09e---xuwadubikikuke.pdfIn PDF document text
    • https://avenue102.com/uploads/file/bidaziloxo.pdfIn PDF document text
    • http://ashole.hu/UserFiles/File/85525191726.pdfIn PDF document text
    • https://nam.it/wp-content/plugins/formcraft/file-upload/server/content/files/16097bfca88ac8---volepobesememajexerido.pdfIn PDF document text
    • http://ajtoablakcentrum.com/_user/file/papererosi.pdfIn PDF document text
    • https://ratsimae.eemedia/contents/file/53867641141.pdfIn PDF document text
    • https://borderpak.com/wp-content/plugins/super-forms/uploads/php/files/0196eec836e4c409ff9b92a23a757336/latiduvafisekiposimada.pdfIn PDF document text
    • http://bendhorseride.com/userfiles/file/wiwebitosufotitazuzug.pdfIn PDF document text
    • http://bloomx.com/sites/all/sites/bloomx.com/files/34012792195.pdfIn PDF document text
    • http://aliancegroup.su/wp-content/plugins/formcraft/file-upload/server/content/files/160948ddd9861d---tugujexarubusakujafizijur.pdfIn PDF document text
    • http://chickendaylacrescenta.com/uploads/files/18342005237.pdfIn PDF document text
    • http://www.mtpartnersfl.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b2a6382bbc5---lawexiturumopup.pdfIn PDF document text
    • https://alshamiltrading.com/alshamilfiles/file/3858468557.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/fzgW7-mxBc0/uplcv?utm_term=ministry+of+correctional+servicesPDF 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fcf4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCF4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00011506.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11506 17032 bytes
SHA-256: 6ec40fd6b2827427e21a1ba3e296ad3c812bba6293802197ae71e6e772c95b8d
font_02_sfnt_off00014101.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14101 10504 bytes
SHA-256: bdbc09e96fba4f69e7c65b18a16288d3242d7d3cac815b5371c00a9259c33353

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