Malicious PDF — malware analysis report

Static analysis result for SHA-256 ee989afaabe04b68…

MALICIOUS

PDF

81.3 KB Created: 2021-09-18 23:47:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-22
MD5: 2714fa10b1ecb374f49ad76d6fd11564 SHA-1: 39943081b79dd72b48cc1272bc4adea32bcd501a SHA-256: ee989afaabe04b681e5d3eed13b14380ca49e3f8b1f0817e87fa301742a4ed6f
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF was flagged by ClamAV as Pdf.Phishing.Trojan and an ML classifier indicated a high probability of maliciousness. Heuristics identified it as a link farm pointing to compromised WordPress uploads and disposable hosting, with one URL containing a UTM term suggestive of a lure. The document body is heavily obfuscated, preventing analysis of its specific content, but the presence of numerous external links strongly suggests a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9833

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://inwebjor.ru/uplcv?utm_term=racing+car+apk+download PDF link annotation
    • https://tabularasa.lv/sites/tabularasa/uploads/documents/files/30912305675.pdfIn PDF document text
    • http://szao-spb.ru/images/news/file/kararoneretofobazupu.pdfIn PDF document text
    • https://husvagnsexpo.se/wp-content/plugins/formcraft/file-upload/server/content/files/1613ef400af0c5---87496503812.pdfIn PDF document text
    • http://footstepfloor.com/upfiles/files/5861670599.pdfIn PDF document text
    • http://starcity-vinhomes.vn/app/webroot/img/files/48084729257.pdfIn PDF document text
    • https://weblative.com/wp-content/plugins/super-forms/uploads/php/files/uhjp136uhmviaiq8gunsbodk7c/fajilo.pdfIn PDF document text
    • http://phuclocvienjsc.com/uploads/image/files/niwazepotawinakusokud.pdfIn PDF document text
    • https://www.playitdirect.ca/ckfinder/uploadfiles/files/48632571358.pdfIn PDF document text
    • http://ambvetfanini.eu/userfiles/files/97316792114.pdfIn PDF document text
    • http://ndt-ultratech.com/files/39357006634.pdfIn PDF document text
    • http://kisito.com/userfiles/file/63702797065.pdfIn PDF document text
    • http://moveisgarciadigital.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16137cd481d78a---70603578148.pdfIn PDF document text
    • http://maekalocal.com/Maeka/UserFiles/File/14014421328.pdfIn PDF document text
    • https://x-software.cz/data/file/47585210385.pdfIn PDF document text
    • http://aleeblog.com/wp-content/plugins/super-forms/uploads/php/files/ptit09r3uvn9ev9m72qthtbsb7/dibaka.pdfIn PDF document text
    • https://incoyun.com/calisma2/files/uploads/zarosewabixedaledorikuwo.pdfIn PDF document text
    • http://bfr-bialapodlaska.pl/userfiles/file/23465155128.pdfIn PDF document text
    • https://bushregenerators.net/userfiles/files/dikaguxi.pdfIn PDF document text
    • http://adabaskimerkezi.com/upload/file/fubipewefe.pdfIn PDF document text
    • http://amsaneeraus.fi/userfiles/files/7314087356.pdfIn PDF document text
    • http://livestreaming.group/wp-content/plugins/super-forms/uploads/php/files/trt6h1ev8rruvnbk4668pval9nudjjb4/fidimofozetanajoxe.pdfIn PDF document text
    • https://carsen.sk/editor_uploads/system/files/98160956228.pdfIn PDF document text
    • http://poaglasses.com/uploads/files/202109140329175371.pdfIn PDF document text
    • http://antonellascarpittadesigner.it/userfiles/files/47386626645.pdfIn PDF document text
    • https://istanbularicilikfestivali.com/upload/ckfinder/files/58041413035.pdfIn PDF document text
    • http://www.fliesen-brill.de/wp-content/plugins/formcraft/file-upload/server/content/files/1613c3d0f78d5e---nifepuvorugepuroki.pdfIn PDF document text
    • https://theptaynam.vn/upload/files/72499732897.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_off0000d9fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9FA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f20c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF20C 18064 bytes
SHA-256: b1e7e06d2094f4a64d1b79a153a48eba27a2548cc375179b28e31ee570d9ea28
font_02_sfnt_off00012022.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12022 10512 bytes
SHA-256: 74d993054f82793455cef7247587b7e0ac7fb29772bf1d9afd9ba98e6c8f9b00

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