Malicious PDF — malware analysis report

Static analysis result for SHA-256 9a04d5d5da71322b…

MALICIOUS

PDF

81.0 KB Created: 2021-09-05 04:58:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 5ac0d4fa896c177dcf2de5588c9314f8 SHA-1: d1428d3ff4c697e51bd6839972dca91579d0cd0a SHA-256: 9a04d5d5da71322b29cf69f21be1ba756091ea34a6d4e9eafbd3190647d6b05c
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains a link farm pointing to multiple compromised WordPress sites, indicating a phishing or malicious content distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. The presence of numerous links on disposable or compromised hosting reinforces the likelihood of a phishing or scam lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

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://www.sacproblemleri.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071b00eeee05---jinemexigajuxevapilo.pdf In PDF document text
    • https://vashadvokat82.ru/wp-content/plugins/super-forms/uploads/php/files/66879e0d24a644e703bc1fb21df0e86b/13211620577.pdfIn PDF document text
    • http://botanicgardenscafe.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16076a2c091d21---vesojujif.pdfIn PDF document text
    • http://finsura-lifedirect.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160b08b237df05---81746962625.pdfIn PDF document text
    • http://koreanhotpot.com/uploads/files/51635393979.pdfIn PDF document text
    • https://isleo.com/i_photos/file/86411767599.pdfIn PDF document text
    • http://makaifruits.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aac1b122201---80184514000.pdfIn PDF document text
    • http://uzmansporzeminkaplama.com/resimler/files/19365359909.pdfIn PDF document text
    • http://www.evisiontiendaonline.com/ckfinder/userfiles/files/66899778390.pdfIn PDF document text
    • https://www.entornopublicitario.com/wp-content/plugins/super-forms/uploads/php/files/14d38ad8c43d4dd504393086340fba00/82764811532.pdfIn PDF document text
    • https://edu-mate.kr/_UploadFile/Images/file/zowopaboviriziri.pdfIn PDF document text
    • https://dongytueduc.com/wp-content/plugins/super-forms/uploads/php/files/bug23a1cncpma4l7dham9kdsqg/3350070171.pdfIn PDF document text
    • https://kolbandibileklik.com/resimler/files/baxodalesozoduzurakatiwan.pdfIn PDF document text
    • http://se-ty.ru/uploads/userfiles/file/vuriremeri.pdfIn PDF document text
    • http://gennarimaq.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607b217e57835---54537093862.pdfIn PDF document text
    • http://samilove-payitforward.com/clients/f/f9/f9b0b202ed5d2cb263a89f8a9bd08a94/File/waragapejebidebowozase.pdfIn PDF document text
    • http://topimmigrationlawyer.org/ckfinder/userfiles/files/miliwapalutukifemovaxi.pdfIn PDF document text
    • https://dacoma.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160941b273ca93---12699961416.pdfIn PDF document text
    • http://datev.hu/ckfinder/userfiles/files/89627115021.pdfIn PDF document text
    • http://kondicionery-krasnogorsk.ru/upload_picture/file/dokekutamefuwivunafu.pdfIn PDF document text
    • https://andrejc.si/files/file/pubisosoji.pdfIn PDF document text
    • http://www.myhhsi.com/wp-content/plugins/super-forms/uploads/php/files/408cd84418c9377172a7abd15db81c52/buxisisezekibe.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3vuEKuznOb8/uplcv?utm_term=trasformare+pdf+in+word+con+ocrPDF 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_off0000d73f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD73F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ef51.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF51 17744 bytes
SHA-256: 34668b5f58a9613775a2474a5a93e657d14c02da34bb76f8f30b5fc35ee6166b
font_02_sfnt_off00011d86.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D86 10688 bytes
SHA-256: 376def178b9bcb9e8a539dc64cb106b925c972ce56e8882e37dd2d232140b366

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