Malicious PDF — malware analysis report

Static analysis result for SHA-256 caab9a28a99cfe6b…

MALICIOUS

PDF

94.4 KB Created: 2021-09-17 03:06:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: d34bf52d80ca5eb3e353097c98d598bf SHA-1: fd7c71d998cedcbd3c427315b5d8e13c25b89d67 SHA-256: caab9a28a99cfe6b68e591dac2191ef4ac1efbbed46bbf8abc2f3be2c07de0c3
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous external URLs, with one heuristic specifically identifying it as a link farm on disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were directly extracted, the PDF structure and embedded URLs suggest it's designed to redirect users to potentially malicious sites, aligning with phishing or malware distribution tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9969

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
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://crysiq.ru/uplcv?utm_term=how+to+unlock+iphone+with+emergency+call+screen+ios+12 PDF link annotation
    • https://wineuniverse.us/userfiles/file/buzoxivapet.pdfIn PDF document text
    • http://hanabi-la.com/uploads/files/48618218528.pdfIn PDF document text
    • https://hosvagyok.hu/userfiles/file/15632353683.pdfIn PDF document text
    • http://goodfortune.hk/UpLoadFile/file///wugutoroki.pdfIn PDF document text
    • https://hexema.com/FCKeditor/file/bovulexuwo.pdfIn PDF document text
    • http://bfcy88.com/uploads/files/sezinuxumebejaramo.pdfIn PDF document text
    • http://samuiluxurytravel.com/Uploads/file/susatalewilepajokumodi.pdfIn PDF document text
    • https://biothiennam.com/media/ftp/file/ruragagexox.pdfIn PDF document text
    • https://kalyna.ua/sites/default/files/userfiles/file/69794301169.pdfIn PDF document text
    • http://xn--tnqz8hz5cb8l.com/upload/files/kufosoxadomop.pdfIn PDF document text
    • https://www.potravinyav21.cz/ckfinder/userfiles/files/bomadubopemapodesitoli.pdfIn PDF document text
    • https://pensiuneaselina.ro/userfiles/file/xaladij.pdfIn PDF document text
    • http://crescentcarpets.com/userfiles/file/9191596107.pdfIn PDF document text
    • http://abwwilson.com/uploads/files/nogadalu.pdfIn PDF document text
    • http://akinmedikal.com/uploads/file/fopive.pdfIn PDF document text
    • https://web-sila.ru/wp-content/plugins/super-forms/uploads/php/files/b3d8f7189c483869f04f53baf6b398f2/fumoruvovotafisulaperuv.pdfIn PDF document text
    • http://nagymester.com/userfiles/file/20619417029.pdfIn PDF document text
    • http://www.elsecretodelolivo.com/wp-content/plugins/formcraft/file-upload/server/content/files/161305a7259755---zidiko.pdfIn PDF document text
    • http://kperrylaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/biboti.pdfIn PDF document text
    • https://namratalakhotia.com/userfiles/files/54980524505.pdfIn PDF document text
    • http://iknow.pl/files/file/53810482714.pdfIn PDF document text
    • http://kepco-group.com/uploaded_files/userfiles/files/xikumetariruwomuri.pdfIn PDF document text
    • http://noticiascgnews.com.br/ckfinder/userfiles/files/juromobubaborodu.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_off0001069d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1069D 19336 bytes
SHA-256: 9945c3cd811bafbee2a2e32b8d95c2716cc7580512c91bc9bcec2b073f829813
font_01_sfnt_off00013885.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13885 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001509c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1509C 11376 bytes
SHA-256: e47a57762b13e21218506762b021a37931cc18939f84819e0327c3efbfb4574d

Open this report in the interactive analyzer, or submit your own file for analysis.