Malicious PDF — malware analysis report

Static analysis result for SHA-256 417c7fd67c4c44a0…

MALICIOUS

PDF

76.0 KB Created: 2021-09-17 22:37:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 7fda30a654f2973af2129c05b7d4e023 SHA-1: 50dd61756a286a284e70a85e5003af8cf423755b SHA-256: 417c7fd67c4c44a0a5c87d358540c06e6a765ba13c91fa3af4b3962aa8de9223
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs pointing to a link farm, a common tactic for phishing or distributing further malware. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were directly extracted, the PDF structure and embedded links suggest it's designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9963

Heuristics 5

  • 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.
  • 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://georgewongdesign.com/gwd/upload/files/69972087352.pdf In PDF document text
    • http://rentbucharest.net/images/userfiles/pumaxufuwaju.pdfIn PDF document text
    • http://mebelhotel.ru/images/news/file/72792092069.pdfIn PDF document text
    • http://digilit.ir/basefile/digilitir/files/panumaxepazunijerasosavu.pdfIn PDF document text
    • http://thrifthelp.com/flash/thrifthelp.com/file/balozovokemuzowegomifi.pdfIn PDF document text
    • http://kossuthdigisuli.hu/userfiles/file/73789579660.pdfIn PDF document text
    • https://banderlogclub.ru/Files/file/99725889937.pdfIn PDF document text
    • https://hinaweb.com/upload/file/72602934745.pdfIn PDF document text
    • http://golden-candies.ru/webroot/files/files/9795647125.pdfIn PDF document text
    • http://mertcelikkapi.com/userfiles/file/ravuzerojiwesijubekinad.pdfIn PDF document text
    • https://www.mds-horizons.com/upload/files/voxetonotosakumaw.pdfIn PDF document text
    • http://www.iece.in/userfiles/file/40690119641.pdfIn PDF document text
    • http://ecofincas.net/ckfinder/userfiles/files/xupaketixixonaxafepekujid.pdfIn PDF document text
    • https://samsungklimamodelleri.com/upload/ckfinder/files/90973985220.pdfIn PDF document text
    • https://pharma-tools.pl/galeria/file/95215957061.pdfIn PDF document text
    • https://cv-vezouze.fr/media/file/jomesabekabazi.pdfIn PDF document text
    • http://asdgolfclubtoscana.com/writable/public/userfiles/file/libetukijutivobatepukiwu.pdfIn PDF document text
    • http://hycxchina.com/filespath/files/20210909113320.pdfIn PDF document text
    • https://urbanlivin.lu/userfiles/files/rexexibivetusabifitevibiv.pdfIn PDF document text
    • http://rosabaum.de/web/editor/files/19913073100.pdfIn PDF document text
    • https://www.gsccn.it/wp-content/plugins/formcraft/file-upload/server/content/files/1614120dd42740---83210672822.pdfIn PDF document text
    • http://dailygameresult.com/editor/UserFiles2/files/kaxapoju.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1xuhb7AK25c/uplcv?utm_term=infinite+money+glitch+gta+5PDF 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_off0000c53d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC53D 17352 bytes
SHA-256: 2316284c94490a752b9bf14ad9ba10498e9afbd91abe08fec65db094aa3f51c3
font_01_sfnt_off0000f269.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF269 10712 bytes
SHA-256: 1def85c9f992647c117c0307f1df6593107df9c559f46d811ca1b82bc8ef3d73
font_02_sfnt_off00010ae4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10AE4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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