Malicious PDF — malware analysis report

Static analysis result for SHA-256 70007327bce00755…

MALICIOUS

PDF

80.2 KB Created: 2021-09-20 03:42:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: a0cd6d0a820ac78561a58936bfc57b2d SHA-1: f1d7ad7da8b533bccfcc759a2f38955b64f669e3 SHA-256: 70007327bce00755d9111216ded0b6a98991489be0ab93603b28a5630b181ee4
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which are part of a link farm hosted on disposable domains, a common tactic for phishing and malware distribution. The ClamAV detection and ML classifier strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URIs suggest it's designed to lure users to malicious sites, likely as a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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://wastran.ru/uplcv?utm_term=apk+du+recorder PDF link annotation
    • https://vibanghanoi.com/uploads/files/binodagomoxuguxigixivi.pdfIn PDF document text
    • http://drentmedischadvies.nl/uploads/files/sojegenutejezok.pdfIn PDF document text
    • https://abandassociates.com/ckfinder/userfiles/files/luzoxowekosebogudidege.pdfIn PDF document text
    • http://curvesncontours.com/userfiles/file/mupekebolibus.pdfIn PDF document text
    • http://physocare.com/Images_upload/files/2123323451.pdfIn PDF document text
    • http://safiorida.dk/operatori/userfiles/file/rozukofija.pdfIn PDF document text
    • https://girisimhaber.com/uploads/file/24830337831.pdfIn PDF document text
    • http://kkc1.org/htdocs/cljr/data/files/71719008934.pdfIn PDF document text
    • http://permagnet.com/upload_files/file/2109200404474923812vrc5z.pdfIn PDF document text
    • https://nailseasupportgroup.com/wp-content/plugins/super-forms/uploads/php/files/4a63d5818850957b754bbd05bbfcaed7/xufogivijegod.pdfIn PDF document text
    • http://ppfi-online.com/userfiles/file/23100802229.pdfIn PDF document text
    • https://vrindaindia.com/php/joseph/uploads/file/tesalabedofip.pdfIn PDF document text
    • https://atlasautoglass.com/wp-content/plugins/formcraft/file-upload/server/content/files/16137b5f20c6fb---bexatavawije.pdfIn PDF document text
    • http://xutricolor.com/uploadfile/files/pitamu.pdfIn PDF document text
    • https://sydneystudytour.com/accounting/userfiles/file/vexiduwajejakotagede.pdfIn PDF document text
    • https://clubesolbra.com/uploads/files/devoz.pdfIn PDF document text
    • https://cyberbirddog.com/userfiles/files/5694177089.pdfIn PDF document text
    • https://kiaavcilar.com/upload/ckfinder/files/99424769135.pdfIn PDF document text
    • http://novena99.com/uploads/files/202109101805568456.pdfIn PDF document text
    • http://tandprotheses.com/ckfinder/userfiles/files/72250184016.pdfIn PDF document text
    • http://lanaecoloridabruzzo.it/userfiles/file/24902417953.pdfIn PDF document text
    • http://minerva-collection.net/files/files/6967391226.pdfIn PDF document text
    • https://vico-real-estate.com/ckfinder/userfiles/files/49519809298.pdfIn PDF document text
    • http://theclelandgroup.com/img/upload/file/48875014008.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_off0000d90d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD90D 17020 bytes
SHA-256: 5635f4d5512e3c90913efece75a4e4cb5f68044390ffbff2e54e914de74aaee7
font_01_sfnt_off000104d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104D5 10008 bytes
SHA-256: fa7df484fee8e7270df51aaa2aa4a60a6ede12b02687cbbedbcd53b77133488e
font_02_sfnt_off00011b29.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B29 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1