Malicious PDF — malware analysis report

Static analysis result for SHA-256 7984ccec3e389605…

MALICIOUS

PDF

115.1 KB Created: 2021-09-03 15:37:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 69c64fc220c7b3dee43d1966b9ccba59 SHA-1: ce733728a5ced73b34be6a48d7a4ddd861c5da1b SHA-256: 7984ccec3e38960587b3822b3065ccc63aeb45b6c1813c7ef1b2d2b8a24bed27
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics and ClamAV as malicious, indicating it is likely a phishing or malware distribution lure. The document contains numerous embedded links pointing to potentially compromised websites and disposable hosting, suggesting an attempt to redirect users to malicious content. While no scripts were explicitly extracted, the presence of external URIs and the overall structure strongly suggest a malicious intent to exploit users via link redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

Heuristics 7

  • 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 to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • 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://allytemp.ru/uplcv?utm_term=litt%C3%A9rature+et+culture+du+moyen+%C3%A2ge+au+xviie+si%C3%A8cle+pdf PDF link annotation
    • https://staffxrecruitment.com/wp-content/plugins/super-forms/uploads/php/files/3fe7ac440857e07a5b5a4bcc69bbdc78/nenanorigadodapenunukam.pdfIn PDF document text
    • http://app8itebarandgrill.com/admin/images/file/16369603028.pdfIn PDF document text
    • https://comesa.com.pe/wp-content/plugins/super-forms/uploads/php/files/aee402985f5180c29a5eccfdccf62912/talavuki.pdfIn PDF document text
    • http://cleannshieldflorida.com/wp-content/plugins/super-forms/uploads/php/files/9d51665753c26578e00915fd6cc2987f/tijigelelelamatinuli.pdfIn PDF document text
    • http://flirdining.com/uploads/files/tanapupojanijo.pdfIn PDF document text
    • https://www.hotelamoha.it/wp-content/plugins/formcraft/file-upload/server/content/files/160bdf30c7503e---suvob.pdfIn PDF document text
    • https://rffsev.ru/wp-content/plugins/super-forms/uploads/php/files/eb5e6367445e2499cf8d72348bc0850f/luxinamujerafevidajomo.pdfIn PDF document text
    • http://studiobaliva.eu/userfiles/files/7524467088.pdfIn PDF document text
    • http://headrepublic.pl/images/files/wutubezutuporividix.pdfIn PDF document text
    • http://www.peopleoftheheath.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ec3f3fe1925---gumitafosetebogabumaze.pdfIn PDF document text
    • https://dfa-finanz.de/wp-content/plugins/formcraft/file-upload/server/content/files/16077c21119f69---matipik.pdfIn PDF document text
    • https://www.chortho.co.uk/wp-content/plugins/super-forms/uploads/php/files/796l9dut722alebj0gntkqk8mr/42517939248.pdfIn PDF document text
    • http://www.urbanwaterways.info/files/83441427360.pdfIn PDF document text
    • https://camile.vn/wp-content/plugins/super-forms/uploads/php/files/ulnm2g9ems1vi25tpb23tkh9j0/devaxagumipibe.pdfIn PDF document text
    • http://indiebookoftheday.com/wp-content/plugins/formcraft/file-upload/server/content/files/161320d80e1703---35436557719.pdfIn PDF document text
    • https://ihotel2b.com/upfiles/editor/files/wivopejovuwite.pdfIn PDF document text
    • https://childrencareandliteracysociety.org/userfiles/files/zisefoseboragerar.pdfIn PDF document text
    • http://chagatea.ru/wp-content/plugins/super-forms/uploads/php/files/d985bfc864dc7d4dc3620262d28848c8/powerobababi.pdfIn PDF document text
    • http://www.x454.com/wp-content/plugins/super-forms/uploads/php/files/71tjlr66qtc0vq6vejvb45da54/77292648896.pdfIn PDF document text
    • http://tcurryproperties.com/konadnew/userfiles/file/ninujopetexoraz.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608d1a7725dd7---najatabelujigakadaxaraw.pdfIn PDF document text
    • http://sethhukumchandschool.com/userfiles/file/gorubad.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_off00014ea9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14EA9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000166c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x166C0 11800 bytes
SHA-256: a74e49ad23cfbc2f1f286ce714426f94f811e12f760f562e844c3ea99a7d7ebe
font_02_sfnt_off000181bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x181BC 23168 bytes
SHA-256: 39521a20b41ce72be91a148bf02ee774138ccaa43d34339ea384fcae46de261e

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