Malicious PDF — malware analysis report

Static analysis result for SHA-256 bad06893cbca1bb5…

MALICIOUS

PDF

73.4 KB Created: 2021-09-03 03:09:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: c11af88238f6940bf1a92a5823f0e872 SHA-1: fe53331f655fced708f8018984fb2dc75794065b SHA-256: bad06893cbca1bb586dd7b3775be2eb292bda2df994dd7834689fa8bd896260d
124 Risk Score

Malware Insights

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

The PDF file contains numerous links, many pointing to compromised WordPress sites, indicating a link farm designed to redirect users. The ClamAV detection as 'Pdf.Phishing.Trojan' strongly suggests a malicious intent, likely phishing or malware distribution. No scripts were extracted, and the document body was unreadable, so the primary indicators are the heuristic firings and the embedded URLs.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.4179

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
  • 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 http://www.rebranded.tv/wp-content/plugins/formcraft/file-upload/server/content/files/160e04d6a0d473---17290022864.pdf In PDF document text
    • http://fhs76reunion.com/clients/0/00/009202203981f132fd14d012a57c0fe5/File/65374022459.pdfIn PDF document text
    • http://chineseclothingonline.net/File/wadosubarami.pdfIn PDF document text
    • https://akapacha.com/userfiles/file/80086276436.pdfIn PDF document text
    • http://inlygiaylynhua.com/upload/files/navulepuvosekisojojerev.pdfIn PDF document text
    • http://mindatpeace.us/uploads/files/86643927034.pdfIn PDF document text
    • https://bilbox.es/wp-content/plugins/super-forms/uploads/php/files/e61dd4302b22d54999f6d3787cbe891b/96173928678.pdfIn PDF document text
    • https://humicdp.com/uploads/2021-08-15/images/files/14123128638.pdfIn PDF document text
    • http://haozuowenwang.com/imagefiles/file/sigidut.pdfIn PDF document text
    • https://wamsconference.com/wp-content/plugins/super-forms/uploads/php/files/3a398dda91ad603009f662a546b960dd/lupepemexukobasopisol.pdfIn PDF document text
    • https://namratalakhotia.com/userfiles/files/96854561961.pdfIn PDF document text
    • https://laatjehuisweerstralen.nl/upload/file/24454741883.pdfIn PDF document text
    • http://files.ibiza-ferien.de/file/gilupefuwisotixujotupi.pdfIn PDF document text
    • https://www.ibyservice.com/wp-content/plugins/super-forms/uploads/php/files/975635052ae44db6e9f9d7852b16255c/zagat.pdfIn PDF document text
    • https://harpethvalleypto.org/wp-content/plugins/super-forms/uploads/php/files/ddc8ffc1bc4ca549f8b8b445e2fa0551/17682699434.pdfIn PDF document text
    • http://vejwun.cz/images/lokejujaxiwitomarube.pdfIn PDF document text
    • http://bharatdarshan.net/rgroup/ckfinder/userfiles/files/37393399573.pdfIn PDF document text
    • http://sake-tori.com/images/library/File/befusogarulatutureviso.pdfIn PDF document text
    • https://actor-conseil.com/files/file/bukitug.pdfIn PDF document text
    • http://brkvinc.com/userfiles/file/61243818292.pdfIn PDF document text
    • http://www.kreasoft.mx/wp-content/plugins/formcraft/file-upload/server/content/files/16088ac44cb0f3---kunudobosevigipir.pdfIn PDF document text
    • http://jncs.kr/page_data/file/20210725224427.pdfIn PDF document text
    • http://finproekt-msk.ru/userfiles/file/tudinapitisujelow.pdfIn PDF document text
    • http://jnnycc.org/userfiles/file/gamomir.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3CAf4wW3hvY/uplcv?utm_term=order+of+operations+differentiated+worksheet+tesPDF 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_off0000d80c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD80C 10752 bytes
SHA-256: 8461fbc86d2d446b082b73d6120f14b31f319951b170ca952f30179ab68a13d1
font_01_sfnt_off0000f0c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0C9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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