Malicious PDF — malware analysis report

Static analysis result for SHA-256 0cf4abe124ff7a8f…

MALICIOUS

PDF

80.4 KB Created: 2021-09-18 07:55:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: d76a14318468be78b605940d9d331f68 SHA-1: 3d7fd36810345615b85e00f403ec174282d613a7 SHA-256: 0cf4abe124ff7a8f1a0c3938a543a3de18b6980a7f4be737ea7b55be3262d595
174 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was flagged by ML classifiers and ClamAV as malicious, exhibiting characteristics of a phishing lure. The presence of numerous external URIs, many on disposable hosting, and the 'Payment redirection lure' heuristic strongly suggest a phishing attempt. While no scripts were extracted, the embedded URLs are the primary indicators of compromise, likely leading to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9949

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Payment redirection / bank-detail change lure high SE_PAYMENT_REDIRECT_LURE
    Document describes new or changed bank, wire, ACH, IBAN, SWIFT, or routing instructions — a high-value business-email-compromise pattern
  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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=mafia+wars+apk PDF link annotation
    • https://eltechma.com/zdjecia/fck/file/77444154405.pdfIn PDF document text
    • http://donleroy.net/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/filosinibijo.pdfIn PDF document text
    • http://suurelepa.ee/data/file/62299887733.pdfIn PDF document text
    • http://pattarasawat.com/ckfinder/userfiles/files/11143742400.pdfIn PDF document text
    • http://www.siscard.com/wp-content/plugins/formcraft/file-upload/server/content/files/16130db399f42b---wimokijavunanetema.pdfIn PDF document text
    • http://amghanoi.com/images/ckeditor/files/soduruvusadurotomet.pdfIn PDF document text
    • http://andersonlawdecorah.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/84337259072.pdfIn PDF document text
    • https://mcsfood.com/images/file/43746488704.pdfIn PDF document text
    • http://doubler-son-capital.com/photos/files/25817052607.pdfIn PDF document text
    • http://www.tobywells.org/media/fckdir/file/98019068038.pdfIn PDF document text
    • https://cplastik.eu/data/cms/file/pakenifenulozukitozom.pdfIn PDF document text
    • http://demkapi.com/resimler/files/tatuvotonog.pdfIn PDF document text
    • http://stressmanagement-karriere.de/userfiles/file/60535191859.pdfIn PDF document text
    • https://rajatotogroup1.com/contents/files/tawuvopobowapujuku.pdfIn PDF document text
    • https://synersys.fr/contenu/file/nunumofapuwe.pdfIn PDF document text
    • https://amrapalispot.com/userfiles/file/56668177968.pdfIn PDF document text
    • http://dalaichau.com/files/nedilukurojedovovusuf.pdfIn PDF document text
    • http://viaterrestre.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1613825f03e55a---gelixe.pdfIn PDF document text
    • https://swapnauraan.com/ckfinder/userfiles/files/tekopozoguserogav.pdfIn PDF document text
    • https://vetregistr.com/ckfinder/userfiles/files/vafujuzoko.pdfIn PDF document text
    • https://callmarkinvestments.com/callmark/files/xavokaniwofutagu.pdfIn PDF document text
    • http://sutipatika.hu/userfiles/files/68917202947.pdfIn PDF document text
    • https://euro-m.si/web/dokumenti/file/jezixudup.pdfIn PDF document text
    • http://szentdorottyapatika.hu/files/ziduzebozerodu.pdfIn PDF document text
    • http://vasekurzy.cz/userfiles/file/sezerudexukokeb.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_off0000d5a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD5A0 18468 bytes
SHA-256: 6f05424cc55cff143dbe4c9e29e93a718cfc7fdc05d35fd5459f211b3529be9d
font_01_sfnt_off00010623.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10623 10020 bytes
SHA-256: a39ebb9645b01baeb2f3b4faf3cdc8146b7a3c1ef652fad9de1e1c24cd06853c
font_02_sfnt_off00011c8e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C8E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1