Malicious PDF — malware analysis report

Static analysis result for SHA-256 bcc123f25ed9cba4…

MALICIOUS

PDF

86.5 KB Created: 2021-09-17 15:05:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 5ef205e3530a124025295a1c88e9f305 SHA-1: 7ad89dad365b89f8a2034bb1d8a198c71df303b4 SHA-256: bcc123f25ed9cba45c6d426cf26018480093b18b24c839eb4c92f48748fc96ea
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The sample is a PDF file flagged by ML classifiers and ClamAV as malicious. It contains numerous external URIs, including one that appears to be a redirector with UTM parameters, suggesting a phishing or malware distribution lure. The PDF structure and embedded content indicate it's designed to exploit vulnerabilities or trick users into visiting malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9948

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 https://queure.ru/uplcv?utm_term=filmorago+pro+apk+free+download+for+android PDF link annotation
    • http://thaiboxes.com/piceditor/file/kaxabuzatu.pdfIn PDF document text
    • http://remont-etalon.ru/upload/files/depubotawanotiluzove.pdfIn PDF document text
    • http://elfobchod.cz/foto/Image/file/45275805666.pdfIn PDF document text
    • http://www.parkwaytransplant.com/media_upload/upload/files/gaxenimozumuvebaxasasavov.pdfIn PDF document text
    • https://messianic.live/wp-content/plugins/super-forms/uploads/php/files/4fa11498b6b9a6be6f1d0f3b7a0fc8f8/wosojalitirotejirowe.pdfIn PDF document text
    • http://ourgans.org/userfiles/files/92237168858.pdfIn PDF document text
    • http://cityfate.com/files/files/tulatutemazivijedotibus.pdfIn PDF document text
    • http://jumpstart.mobi/userfiles/file/2273676045.pdfIn PDF document text
    • http://ottuk-e.org/userData/board/file/7433088869.pdfIn PDF document text
    • http://xahscw.com/userfiles/file/74367316284.pdfIn PDF document text
    • http://dreamcatcherltd.com/userfiles/file/83629640940.pdfIn PDF document text
    • https://amartzon.store/wp-content/plugins/super-forms/uploads/php/files/0d245002b0e471e9718cf09e2971ebb4/4267044125.pdfIn PDF document text
    • https://marcuspietrek.de/MARCUS/files/file/kajilogowebakorerabevule.pdfIn PDF document text
    • http://tzoetemondje.be/uploads/files/rusobutevow.pdfIn PDF document text
    • http://lacasedescaraibes.fr/file/rilisetovijiko.pdfIn PDF document text
    • https://tonere.shop/app/webroot/files/userfiles/files/9424819082.pdfIn PDF document text
    • http://xn--pr3b03lcdvwu9dpynqkc.com/DATA/file/20210911192901.pdfIn PDF document text
    • https://fiscalonline.eu/app/webroot/files/userfiles/files/lewomawe.pdfIn PDF document text
    • http://ikhmongol.mn/ckfinder/userfiles/files/vezipamalobozo.pdfIn PDF document text
    • http://oprandi.it/userfiles/files/83634862787.pdfIn PDF document text
    • http://praguynakorn.com/praguynakorn/picture/datapro/files/dajugabomosijumite.pdfIn PDF document text
    • http://noithatmfc.com/media/ftp/file/tiveninogawilos.pdfIn PDF document text
    • http://aquatherm-graz.at/files/23618600577.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_off0000ec9a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC9A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000104ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104AC 18280 bytes
SHA-256: d46bbf390984f2b47e928697f7a7bf1157694c2274f7acdb64a491c53a4205d3
font_02_sfnt_off0001346c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1346C 10728 bytes
SHA-256: 03b3a8103bbed55c500b9931e0dec4ddb367b969274d607cb162d015df6c3cc8