Malicious PDF — malware analysis report

Static analysis result for SHA-256 61eb0f6ab5b60208…

MALICIOUS

PDF

87.6 KB Created: 2021-08-06 10:28:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 637a6591a318457aca70335de8b1bb4e SHA-1: c6b4b11893c8a8ab5be0da55f8aee7420a58f37b SHA-256: 61eb0f6ab5b60208a87ab1157a41c6b7687ddfabebadfc106129eb0890a983d6
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many pointing to compromised websites or disposable hosting, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URLs are consistent with techniques used to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://dtcprojects.com.au/wp-content/plugins/super-forms/uploads/php/files/e82l4l7168tjpp1sm6r83hln6s/28326804137.pdf In PDF document text
    • https://fotokeramika.bg/userfiles/file/77587520249.pdfIn PDF document text
    • http://www.tomasjelinek.com/img/pub/file/80621523306.pdfIn PDF document text
    • http://www.agrosystem.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1609de2af1a467---68605388113.pdfIn PDF document text
    • http://foire-fromages-et-vins.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608760aa7ba22---47665562573.pdfIn PDF document text
    • http://www.orarestauratorisaf.it/wp-content/plugins/formcraft/file-upload/server/content/files/16085cdfe7b496---pekewutumikijedawuximak.pdfIn PDF document text
    • http://millionsdiscount.com/mo_images/files/79299386515.pdfIn PDF document text
    • http://hurtglass.pl/upload/file/10990972087.pdfIn PDF document text
    • http://www.agrosystem.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160f6eaa569112---sowamuzi.pdfIn PDF document text
    • https://monarchwinemerchants.com/wp-content/plugins/super-forms/uploads/php/files/8882e4638ce0429f6721024d15de9687/80650802428.pdfIn PDF document text
    • http://globalnetworks.de/www.galabau-poscher.de/main/preview/ckfinder/userfiles/files/59612417447.pdfIn PDF document text
    • http://thebrownsfamilyreunion2008.com/clients/81208/File/vovasoveveratalakumawaf.pdfIn PDF document text
    • http://ats-dz.com/userfiles/file/bekef.pdfIn PDF document text
    • http://pizzeria-millemiglia.de/app/webroot/img/editor/file/mixolewovilibiw.pdfIn PDF document text
    • https://reparationmobile.net/userfiles/file/73079811376.pdfIn PDF document text
    • https://amezdigital.com/wp-content/plugins/super-forms/uploads/php/files/07d5a8b17792bb8198c6829c3b488e3c/85586948702.pdfIn PDF document text
    • http://carrozzeriabosini.net/userfiles/files/49851468418.pdfIn PDF document text
    • http://santamariamikado.com/uploads/files/bikejaxuxosobogitozipe.pdfIn PDF document text
    • https://hoffmanowska.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160f150b9570c0---nizew.pdfIn PDF document text
    • https://xo-sound.ru/userfiles/file/papoda.pdfIn PDF document text
    • http://midiabyz.com/wp-content/plugins/super-forms/uploads/php/files/ba73958332c8d33895bd072455368d17/soror.pdfIn PDF document text
    • http://www.tif.cn/wp-content/plugins/super-forms/uploads/php/files/drn7dpvph42lql5mqmvcelc2t2/95866257720.pdfIn PDF document text
    • https://www.cdscabling.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160fb333779ece---podid.pdfIn PDF document text
    • http://teraval.cz/res/file/tasuworazozexunajirutowo.pdfIn PDF document text
    • http://delawaretravelmedicine.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608ebe3c59f50---zuwodapus.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/cv9VXjIrmdE/uplcv?utm_term=hollywood+action+movies+in+hindi+dubbed+free+download+mp4PDF 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_off0000f0a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0A9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000108c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x108C0 11460 bytes
SHA-256: fa9de9c97d3d16ec45e8835a53d8c40570132319584a23dcc54db7c5c2b639c2
font_02_sfnt_off0001236c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1236C 16988 bytes
SHA-256: 0eff8e926d85379fe91718c8f039157837c01c2eed7994610908874b4ff873f0