Malicious PDF — malware analysis report

Static analysis result for SHA-256 7f6596ef107c7fc3…

MALICIOUS

PDF

75.3 KB Created: 2021-09-18 08:51:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 9e7259048a66d9e276e5f8fdf5bd5bbe SHA-1: c81daedf22928dac03ea66e2111a513002391c29 SHA-256: 7f6596ef107c7fc390d806dfe9dd2fc28b8a907bd93b3527b2ad3d9c1cd9e50b
146 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged as malicious by a ML classifier and ClamAV, indicating a phishing and trojan threat. The heuristic 'SE_CALLBACK_LURE' strongly suggests the document is designed to trick users into calling a fraudulent support number. While no scripts were explicitly extracted, the presence of numerous external URLs and the PDF structure itself point towards a phishing or scam attempt, likely delivered as a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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
  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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://smidgel.ru/uplcv?utm_term=rush+royale+strategy PDF link annotation
    • http://geofer.eu/userfiles/files/32349736369.pdfIn PDF document text
    • http://litho-and-co.fr/ckeditor/upload/files/kobepameratavevavezilenev.pdfIn PDF document text
    • http://cameranichietsu.com/luutru/files/jegad.pdfIn PDF document text
    • https://parisnordmedical.fr/docs/file/wapepubipimofu.pdfIn PDF document text
    • http://capriololaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/18397577587.pdfIn PDF document text
    • http://noithatmfc.com/media/ftp/file/7993919687.pdfIn PDF document text
    • http://autoscuolepintozzi.it/userfiles/files/29866793948.pdfIn PDF document text
    • http://connectcontrol.net/files/userfiles/files/vavinil.pdfIn PDF document text
    • https://elnativocoffee.com/silver/upload/files/30037784955.pdfIn PDF document text
    • https://bisleri.genefied.co/ckfinder/userfiles/files/28988274721.pdfIn PDF document text
    • https://ekinyalitim.com/depo/sayfaresim/file/zojudaxapuzi.pdfIn PDF document text
    • https://dcimx.com/files/40119373619.pdfIn PDF document text
    • http://maketmaster.ru/admin/ckfinder/userfiles/files/43737087824.pdfIn PDF document text
    • https://diphong.com/uploads/38901463358.pdfIn PDF document text
    • http://dainindo.com/Uploads/userfiles/files/girigorikeleludupaxuja.pdfIn PDF document text
    • http://skkl.cn/filespath/files/20210909034838.pdfIn PDF document text
    • http://maiodi.com/userfiles/files/kuruvibi.pdfIn PDF document text
    • https://elsa-daulte.com/ckfinder/userfiles/files/91032482893.pdfIn PDF document text
    • http://ylphs.com/ckfinder/userfiles/files/72530167370.pdfIn PDF document text
    • http://tulga.ru/editor/files/zulorudesidezonesatofa.pdfIn PDF document text
    • http://orkoien.com/userfiles/files/99476376417.pdfIn PDF document text
    • https://inchiriereelicopterromania.ro/wp-content/plugins/formcraft/file-upload/server/content/files/161378d75086a3---wovosopi.pdfIn PDF document text
    • http://icoenergia.com/userfiles/files/37319019874.pdfIn PDF document text
    • http://oio.cn/uploadfiles/files/kurusenuzoj.pdfIn PDF document text
    • http://clinical-pain.com/pds/userfiles/files/zatokaji.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_off0000c4b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC4B0 16532 bytes
SHA-256: 12f71934bcfef65567dbdcb8c9231363efb92f6122a26e2bf744ca7aae9f89c4
font_01_sfnt_off0000ef75.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF75 10452 bytes
SHA-256: 765a339602ea112bbd8f6a206796304d43e304d1cce81dfc48cd91e890660bdb
font_02_sfnt_off00010779.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10779 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1