Malicious PDF — malware analysis report

Static analysis result for SHA-256 96d974745a479c7f…

MALICIOUS

PDF

84.9 KB Created: 2021-07-16 13:29:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 57d3f4f885e9baa6a361a53758d28ff3 SHA-1: 9f76c51a56ad156e5f6f04942c0d22aa501ee019 SHA-256: 96d974745a479c7f11bcbb17504fc601dceb6f0fac9c9e18de61a59fce222b1b
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The file was detected by ClamAV as Pdf.Phishing.Trojan and an ML classifier flagged it with high confidence. It contains numerous links pointing to compromised WordPress upload storage and other disposable hosting, suggesting a link farm designed to redirect users. The presence of these links indicates an attempt to lead users to malicious content, likely for phishing or further malware delivery.

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 http://bukharaatlanta.com/sites/default/files/file/tujolodukuwevemo.pdf In PDF document text
    • https://bodegoncriollo.com/userfiles/file/nigusuxozojuvuge.pdfIn PDF document text
    • https://www.hdcorp.com.br/wp-content/plugins/super-forms/uploads/php/files/ondhepakn9be7opdh27betjddn/xabasigazukasoje.pdfIn PDF document text
    • http://rafaelokazakov.com/file/majerobimarugevolijulizi.pdfIn PDF document text
    • http://precedent.by/_newsite/images_from_html_editor/file/77189723095.pdfIn PDF document text
    • http://aksaaydinlatma.com/img/editor/image/file/77749614172.pdfIn PDF document text
    • https://siyata.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/16085641ec9b3a---79093166863.pdfIn PDF document text
    • http://metzpaintings.com/wp-content/plugins/formcraft/file-upload/server/content/files/16099423b9c631---xijukuwotuvelotijufapit.pdfIn PDF document text
    • http://www.grupohk.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1609cb603a9314---jimovugejutalajonupipe.pdfIn PDF document text
    • http://tkhomedeco.com/assets/uploads/ckedit/files/20210716163836.pdfIn PDF document text
    • http://geredekombiservisi.com/userfiles/file/vigowutofek.pdfIn PDF document text
    • https://ozmutludokum.com/userfiles/file/feduro.pdfIn PDF document text
    • https://powermailer.in/userfiles/file/ferusuwesamozo.pdfIn PDF document text
    • http://www.toeterloeh44.de/files/76258773374.pdfIn PDF document text
    • http://aivieksteslaivas.lv/userfiles/file/wasowolapubapononusizafir.pdfIn PDF document text
    • https://gift-edu.ru/wp-content/plugins/super-forms/uploads/php/files/af22283604f04aacedcc33b4cabbe590/vupejovetosurura.pdfIn PDF document text
    • http://inter-travel.hu/_user/file/bokafusebalunanalugi.pdfIn PDF document text
    • http://gnatowski.pl/attachments/file/84774216740.pdfIn PDF document text
    • http://www.loicadesacavem.pt/wp-content/plugins/formcraft/file-upload/server/content/files/1609204ac73449---jasolivajekomukevexekakew.pdfIn PDF document text
    • http://sh8ke.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608d2e2911540---71379032973.pdfIn PDF document text
    • http://sinproval.it/userfiles/files/vuzaxafukasu.pdfIn PDF document text
    • http://aberdeeneyes.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16077c63a35713---diponivurubinurewokedozu.pdfIn PDF document text
    • http://creativeindustries.ru/uploads/userfiles/file/defuwidonisufizakulifomoj.pdfIn PDF document text
    • http://witnesstherealist.com/wp-content/plugins/super-forms/uploads/php/files/53d0c97739220e625d1420d063d030ee/73268128327.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3vuEKuznOb8/uplcv?utm_term=how+to+use+would+and+couldPDF 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_off0000eb56.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB56 10348 bytes
SHA-256: 1ecfe441cc36a1000816dfa5fa6340875b94d3994bb99bd5b4cfb29c91c01658
font_01_sfnt_off000102ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102EE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011b00.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B00 17132 bytes
SHA-256: 03ec7ff1061f073c8bdc8eaa707917766c4cd019667f1572791d3ed218682204