Malicious PDF — malware analysis report

Static analysis result for SHA-256 49d6640a2f680597…

MALICIOUS

PDF

76.2 KB Created: 2021-07-16 21:48:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 7d37f74d0fe4fa83a0a9c37685b55168 SHA-1: da72af2209cf5bd8736a2996663c84a3414cdad1 SHA-256: 49d6640a2f680597343837bf7d87ccee3fd4210a3dbc7d9e807133523e3c2f12
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to compromised CMS upload directories, suggesting a phishing or malware distribution scheme. The ClamAV detection and ML classifier further support its malicious nature. The document body is heavily obfuscated and appears to be generated content rather than user-readable text.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6966

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
  • 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
  • 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://ludifrance.fr/userfiles/file/31153620306.pdf In PDF document text
    • http://kaowei.tw/image/files/20210528_010753.pdfIn PDF document text
    • https://balance-global.com/wp-content/plugins/super-forms/uploads/php/files/c1ksa3fns2ujtv2kqea6v3o8f6/25645190389.pdfIn PDF document text
    • http://oneself.pro/wp-content/plugins/formcraft/file-upload/server/content/files/1609a5845f0d45---jukasadikezatudekolede.pdfIn PDF document text
    • http://www.kinoimaging.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16084fd17287ff---pizobafadelowob.pdfIn PDF document text
    • http://pressvaluation.net/userfiles/file/bukafekaxumawijakumi.pdfIn PDF document text
    • https://www.demetagras.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c7767ef693---13336725016.pdfIn PDF document text
    • http://www.predia.cz/userfiles/file/63701580146.pdfIn PDF document text
    • http://diplomat2014.ru/ckfinder/userfiles/files/makipab.pdfIn PDF document text
    • https://www.varishastalari.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a5b12686c6---zojemonulovexebede.pdfIn PDF document text
    • https://commonwealthsportsawards.com/userfiles/file/77243779953.pdfIn PDF document text
    • http://lakes77.com/clients/47041/File/86798750056.pdfIn PDF document text
    • https://trsbarriersdirect.com/wp-content/plugins/super-forms/uploads/php/files/dn8753f922p6ln9snsn2t7avbh/93635947451.pdfIn PDF document text
    • https://www.lumisolar.pe/wp-content/plugins/formcraft/file-upload/server/content/files/1607137823637b---nugitefi.pdfIn PDF document text
    • http://www.combatsim.eu/wp-content/plugins/formcraft/file-upload/server/content/files/16080606cb95fa---fanejebebafojawomevife.pdfIn PDF document text
    • http://training-solutions.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1606f282ea48f4---gasizetepetawoja.pdfIn PDF document text
    • http://mahkotacare.com/tmr/userfiles/files/93431647586.pdfIn PDF document text
    • https://micast.de/wp-content/plugins/super-forms/uploads/php/files/hrju9ijdnoumvuq0620q6gtmlf/vopejobid.pdfIn PDF document text
    • https://polandpools.com/contents//files/naripadipujiso.pdfIn PDF document text
    • http://www.bluewhaleline.com/image/upload/File/nekukurad.pdfIn PDF document text
    • https://etonbio.com/newsLetters/images/file/zepanekezamikovakunawisu.pdfIn PDF document text
    • http://www.supercarrentalsofmiami.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b7eedf1625---laxejuzepelewaze.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/zMnd8XtcwSM/uplcv?utm_term=tactical+combat+casualty+care+pdfPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e4fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4FA 17604 bytes
SHA-256: 09b73dc9e514f1c79c81a9684811d64e265aae29fc6de6706b6290261f215d32
font_01_sfnt_off000112bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x112BC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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