Malicious PDF — malware analysis report

Static analysis result for SHA-256 e025083870934c69…

MALICIOUS

PDF

78.3 KB Created: 2021-09-11 17:30:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 250b954a354b99a8235c4d6c71212d28 SHA-1: ed292b34433a5d7b2516fae029415c906471cc69 SHA-256: e025083870934c69d869d786605d95b3b16e9368bbbe2b8fe23feff203576bdd
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs pointing to disposable domains, a common tactic for phishing or distributing further malware. The 'PDF_SEO_DISPOSABLE_LINK_FARM' heuristic and the high ML score strongly indicate malicious intent. While no scripts were explicitly extracted, the presence of external URIs and the overall structure suggest the PDF is designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9968

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://allytemp.ru/uplcv?utm_term=android+fileprovider+external+storage PDF link annotation
    • https://vico-inmobiliaria.com/ckfinder/userfiles/files/11641388048.pdfIn PDF document text
    • http://offerparts.com/upload/files/xemajiwowukowerikag.pdfIn PDF document text
    • http://old.bgk-meshkova.com/ckeditor/ckfinder/userfiles/files/vogejunom.pdfIn PDF document text
    • https://gamletaarnhuset.no/wp-content/plugins/formcraft/file-upload/server/content/files/1612fb328477c3---mokisejimevakitularo.pdfIn PDF document text
    • http://thebeautyofdesign.nl/ckfinder/userfiles/files/sunumab.pdfIn PDF document text
    • https://nexapos.com/upload/files/41543796940.pdfIn PDF document text
    • https://nada70.org/userfiles/file/xipirozoko.pdfIn PDF document text
    • http://lavalnerina.it/userfiles/file/29563898018.pdfIn PDF document text
    • https://www.singaporemedicalclinic.com/ckfinder/userfiles/files/40537522572.pdfIn PDF document text
    • https://kochitaxirental.com/ckfinder/userfiles/files/febelufegagofatovinuberub.pdfIn PDF document text
    • http://smingames.com/ckfinder/files/dawozaneraruripiperav.pdfIn PDF document text
    • http://administratieindex.nl/images/uploads/45368056742.pdfIn PDF document text
    • http://www.serenissimaservizi.com/files/59419739550.pdfIn PDF document text
    • https://optical-axis.com/uploads/files/202109062245449739.pdfIn PDF document text
    • http://eperon-kochersberg.com/img_db/22310926387.pdfIn PDF document text
    • http://mamolenasnc.it/userfiles/files/44866213194.pdfIn PDF document text
    • https://davidfoleyinc.com/userfiles/file/49591381370.pdfIn PDF document text
    • https://durgabas.coop.np/ckfinder/userfiles/files/barexiga.pdfIn PDF document text
    • http://hotelrealerimini.it/userfiles/files/xiniremaxux.pdfIn PDF document text
    • http://3gr-group.com/ci/userfiles/files/18578767641.pdfIn PDF document text
    • https://pfollowers.com/ci/userfiles/files/vepazo.pdfIn PDF document text
    • https://callhfelectric.com/wp-content/plugins/formcraft/file-upload/server/content/files/161317893edb3a---ligubakolumalaseja.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_off0000c81f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC81F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e031.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE031 19792 bytes
SHA-256: 8b1c7b4df750ae036759e3f91dd0708be60b2cb109303a6ac5ec9c6f99fda86e
font_02_sfnt_off000112d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x112D2 10824 bytes
SHA-256: e2da124ea94c0121a5648369be9504356139233c7d0d41278ccf6d180a8b0779

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