Malicious PDF — malware analysis report

Static analysis result for SHA-256 abdabd6a5da6db26…

MALICIOUS

PDF

79.2 KB Created: 2021-08-21 20:49:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 5c8991113cd8af9e8559f1343f059655 SHA-1: 9ebf790f967b124be414375621315be52cb79631 SHA-256: abdabd6a5da6db2634afe2690c536cf14b2e9f1a3491a2a99de3703c3afef321
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of links, many pointing to compromised websites or disposable hosting, indicative of a link farm used for phishing or malware distribution. The ML classifier and ClamAV detection strongly suggest malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded URIs are consistent with techniques used to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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 http://conservationenergy.com/wp-content/plugins/formcraft/file-upload/server/content/files/16096a16705909---tolobimepe.pdf In PDF document text
    • https://divorcioconsensual.com.br/wp-content/plugins/super-forms/uploads/php/files/b9df8d271b04919e94cfed5aae533d59/bufovewakuputisigopap.pdfIn PDF document text
    • https://tl-systems.hu/files/files/78420856029.pdfIn PDF document text
    • https://airflow-skateboards.com/upload/file/nezodesoravudevuge.pdfIn PDF document text
    • https://www.landalastadservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a744e3a3740---10766989615.pdfIn PDF document text
    • http://mdsalon.ru/img/lib/file/nezewomesabiwujuj.pdfIn PDF document text
    • https://alcc.vn/wp-content/plugins/super-forms/uploads/php/files/9k9gbqiijb3p3johv331gdgfml/pemuvapopibabuzikij.pdfIn PDF document text
    • http://www.argentum.com/wp-content/plugins/super-forms/uploads/php/files/gk0lrrlac3privqo37m2mjhrl0/48268752204.pdfIn PDF document text
    • http://unicaconsultoriarh.com/images/files/lofevazuxe.pdfIn PDF document text
    • https://buka.ru/sadm_files/pebamitevoje.pdfIn PDF document text
    • http://snotlicker.com/clients/10243/File/78210215922.pdfIn PDF document text
    • https://gradeagroup.com/wp-content/plugins/super-forms/uploads/php/files/i6p8tn3r2m063dustqe5n42ijk/seninedovosomuv.pdfIn PDF document text
    • http://xn--82cac8d3ajrc0gd0bo4a7nf3qg.com/userfiles/files/ralumivijetinotipopuxi.pdfIn PDF document text
    • https://bestofbucerias.com/upload/file/wedijuwu.pdfIn PDF document text
    • https://www.hauptsache.cc/wp-content/plugins/formcraft/file-upload/server/content/files/160bd12f8a219d---81298052921.pdfIn PDF document text
    • http://retrievers.su/ckfinder/userfiles/files/bazuwagefomo.pdfIn PDF document text
    • http://er-trans.com/img/produkty/files/tugifawimelupasaxeribix.pdfIn PDF document text
    • http://burmeseburmilla-allevamento.com/userfiles/files/66322594798.pdfIn PDF document text
    • https://accuratesearch.com/userfiles/file/jadufox.pdfIn PDF document text
    • http://debschoen.com/userfiles/file/vikoferopudaje.pdfIn PDF document text
    • https://shiokuda2.com/contents//files/vagadakijalowunosojo.pdfIn PDF document text
    • https://aduanaldelvalle.com/userfiles/file/35750108142.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1KS0DP0cxss/uplcv?utm_term=pirates+of+the+caribbean+1+tamil+dubbed+movie+download+tamilplayPDF 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_off0000cb60.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCB60 18160 bytes
SHA-256: e90b2324e37ea071c8d57f9abe61b72d808a8b78775cb601e0af84c2dd9e2ecb
font_01_sfnt_off0000fb29.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB29 11444 bytes
SHA-256: 44024477e0cfeb83ca417a9396e96a2531e34155142516437ad5c77d8f4ea227
font_02_sfnt_off000115f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x115F1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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