Malicious PDF — malware analysis report

Static analysis result for SHA-256 49aa936bf06d553f…

MALICIOUS

PDF

85.2 KB Created: 2021-06-30 17:34:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: b4484d8a42d27ffaed5342d081589de3 SHA-1: e102a77a02f80cccd9dff1f4c321e48af93c5e97 SHA-256: 49aa936bf06d553fe6940447f7fbcb60980d7f266a3201e8bd6d27547da7fce4
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous external URIs and link farm patterns, indicating a likely phishing or malware distribution attempt. The ClamAV detection and ML classifier strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded links are indicative of a malicious document designed to lure users to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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://garglob.ru/uplcv?utm_term=textile+cleaning+company PDF link annotation
    • http://whs1963.com/clients/7/75/758a827d59fb1c2827eec60421ffdc22/File/rumepixopagebunem.pdfIn PDF document text
    • http://www.orarestauratorisaf.it/wp-content/plugins/formcraft/file-upload/server/content/files/160a510a429d17---xitig.pdfIn PDF document text
    • http://www.jamesbgriffinlaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bf83560ebf2---83696080554.pdfIn PDF document text
    • http://www.thebetterinsurance.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608c5ef0c06ae---vafezo.pdfIn PDF document text
    • http://toyotalongbien.org/data/dulieu/files/mufut.pdfIn PDF document text
    • https://www.nosolodespedidas.es/wp-content/plugins/formcraft/file-upload/server/content/files/1608dede7d1c8c---43777056734.pdfIn PDF document text
    • https://bestofbucerias.com/upload/file/89680464994.pdfIn PDF document text
    • http://reclaimsplus.com/wp-content/plugins/super-forms/uploads/php/files/fa447a4b5fc511988a03f91a13ee6a9d/45746508325.pdfIn PDF document text
    • https://heider.ru/wp-content/plugins/super-forms/uploads/php/files/ed867a79c5e04a794d06616a02ff56e9/84598454313.pdfIn PDF document text
    • http://thebrownsfamilyreunion2008.com/clients/81208/File/tolimowipu.pdfIn PDF document text
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607e26f2e0ba8---bawiluriwolajex.pdfIn PDF document text
    • http://yuseigachi.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160825f48bc6b1---58680777102.pdfIn PDF document text
    • https://www.lenoir-elec.com/wp-content/plugins/super-forms/uploads/php/files/stofica72up7prje3idn8s2gki/18344793575.pdfIn PDF document text
    • http://jun-travel.com/userfiles/file/47822269928.pdfIn PDF document text
    • https://www.karenlovelee.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c84c023dd50---1160486744.pdfIn PDF document text
    • http://accessiblevehicleservices.com/userfiles/file/85878363308.pdfIn PDF document text
    • http://fdceta02.fr/catalogue_dynamique/file/17323978700.pdfIn PDF document text
    • https://aulacvn.com/upload/fck/file/wijivisibomunif.pdfIn PDF document text
    • https://gservicepz.com/wp-content/plugins/super-forms/uploads/php/files/71f945530dbd0362ce09ad3418926b20/74313861152.pdfIn PDF document text
    • https://goldengrowers.com/wp-content/plugins/super-forms/uploads/php/files/a78d1ecfdb196d9bf5acb5feed3e8dbd/sejixowijobilubapos.pdfIn PDF document text
    • https://www.golaw.net/wp-content/plugins/formcraft/file-upload/server/content/files/160beb62d2deac---fisajasojopen.pdfIn PDF document text
    • http://ansatrans.ru/admin/ckfinder/userfiles/files/dobanoxuziluloxosijumed.pdfIn PDF document text
    • https://micast.de/wp-content/plugins/super-forms/uploads/php/files/f0va0ed2thg211n9lsb8l85fkn/seruwusugojenivovet.pdfIn PDF document text
    • http://botosani.ro/img/uploads/file/66410743391.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_off0000eb9f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB9F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000103b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103B6 10628 bytes
SHA-256: 8b69148e795654cbd5ed3c2bac2443075a2b2e8f60bcaf760e27775fe951a3bc
font_02_sfnt_off00011c10.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C10 16772 bytes
SHA-256: 7728348076248639840a9490c8dbd73a70471568cd6b48c21b4341d7b5295f02

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