Malicious PDF — malware analysis report

Static analysis result for SHA-256 27c308db025e38f3…

MALICIOUS

PDF

68.3 KB Created: 2021-10-10 05:18:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23
MD5: 5fa5b72a251f2f7da42fe293ea2086ee SHA-1: 2e0aca075c632a351a6352adc39ba04732619bec SHA-256: 27c308db025e38f36f524fd080113cd1f86c02f8c85f4495f702f3135fa7403a
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external websites, many of which are hosted on compromised or disposable domains, suggesting a phishing or scam campaign. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URLs are consistent with a phishing lure designed to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9966

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 https://drafthe.ru/uplcv?utm_term=milan+day+result+today PDF link annotation
    • https://profipreklady.cz/www/ckfinder/userfiles/files/32424375156.pdfIn PDF document text
    • http://americansemitruckparts.com/d/files/wujobub.pdfIn PDF document text
    • https://nomortiga.com/contents/files/67156757814.pdfIn PDF document text
    • https://websbag.com/uploads/files/98768012698.pdfIn PDF document text
    • https://www.peeryhotel.com/wp-content/plugins/super-forms/uploads/php/files/5972b9a409a87113abb921ad76477171/newaxi.pdfIn PDF document text
    • https://bbensonmft.com/wp-content/plugins/super-forms/uploads/php/files/0ae5b18ad4c18197f545e9538f375840/bipoda.pdfIn PDF document text
    • https://barcelonacentromedico.es/files/galeria/files/salarubatekigukat.pdfIn PDF document text
    • http://ristoranteibucanieri.it/userfiles/files/poravud.pdfIn PDF document text
    • https://amzentransportationindustries.com/admin/imagetemp1/file/gavodefivuzedudemoxebazor.pdfIn PDF document text
    • https://hotelritariccione.it/wp-content/plugins/formcraft/file-upload/server/content/files/16150e0df18240---10663161972.pdfIn PDF document text
    • http://mmckno2010.zkosuchdol.info/files/20668593241.pdfIn PDF document text
    • https://sopkambing.com/contents/files/fopepiwunoga.pdfIn PDF document text
    • https://highendteen.com/userfiles/files/80356153468.pdfIn PDF document text
    • http://winkeleninzundert.nl/uploadimages/files/wikis.pdfIn PDF document text
    • http://ingmontagna.com/userfiles/files/fefofizutexuvizodiv.pdfIn PDF document text
    • http://turystyka.powiatlubartowski.pl/admin/ckfinder/userfiles/files/43553957986.pdfIn PDF document text
    • https://highfieldhousehotel.net/nbloom/fckuploads/file/84580525090.pdfIn PDF document text
    • https://path.mn/userfiles/files/20973981515.pdfIn PDF document text
    • http://tolltisztitas.eu/userfiles/files/reluvepilekobemajatadod.pdfIn PDF document text
    • http://etalentlink.com/uploadfile/file///2021090207032833.pdfIn PDF document text
    • https://badeluxe.com/userfiles/files/powovozudes.pdfIn PDF document text
    • http://e1pl2.nazwa.pl/busy/fotki/file/33388825618.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_off0000ad73.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAD73 15300 bytes
SHA-256: 5cf754297989d2a7a292b624b42116f0ad555b30a984edee58a8871aa4d3cc89
font_01_sfnt_off0000d43d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD43D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000ec54.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC54 10448 bytes
SHA-256: 6d67733f4d095c2bc3f51eccca4e397130c3481ddecb75df074b95abdfe07f1a