Malicious PDF — malware analysis report

Static analysis result for SHA-256 a39205f61c90162d…

MALICIOUS

PDF

82.0 KB Created: 2021-08-04 06:33:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: eb173f58701244c4e4320d4ee872a563 SHA-1: 54518df7116a5be9736a711ada286ad7c7553b59 SHA-256: a39205f61c90162d49fd0e1cd3efd465992a7acb83b68821272bcd08de333f6f
156 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous links to external websites, many of which are hosted on compromised CMS platforms or appear to be part of a link farm, suggesting a phishing or malware distribution scheme. The PDF structure and embedded links point towards an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

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
  • 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
  • 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 http://musiclivemarsala.com/userfiles/files/minuxexogesajopite.pdf In PDF document text
    • http://allamericannursing.com/userfiles/file/rawurojurudeso.pdfIn PDF document text
    • http://myboydfamily.com/clients/7/7f/7f513a2250c12de81a70a6735749c289/File/85026117874.pdfIn PDF document text
    • https://regenerativetherapyforpain.com/wp-content/plugins/super-forms/uploads/php/files/6dc90a302a6ab454e73a67efbafdf423/34793531301.pdfIn PDF document text
    • http://mppscstudy.com/admin/usercontent/file/jojovalimimimen.pdfIn PDF document text
    • https://carthink.org/wp-content/plugins/formcraft/file-upload/server/content/files/160ec4efe3cfe9---13146097697.pdfIn PDF document text
    • https://www.hdontheroadnapoli.it/wp-content/plugins/formcraft/file-upload/server/content/files/160abfe0f194f2---99345711092.pdfIn PDF document text
    • https://thepetrichortouch.com/wp-content/plugins/super-forms/uploads/php/files/5c343qf5hn03t1io89gr59e3dq/womizusazixigonawuko.pdfIn PDF document text
    • http://residenceraffaellotorino.com/userfiles/files/ditaxokifidelazupabo.pdfIn PDF document text
    • https://pavaniautismschools.com/wp-content/plugins/super-forms/uploads/php/files/7rjh0nrtepfavobrmkbm8ufm63/tewejakepixibeduko.pdfIn PDF document text
    • https://photographerin.agency/wp-content/plugins/super-forms/uploads/php/files/sj8i16nbkh4l32q4g92d98l257/jesejeborupuzo.pdfIn PDF document text
    • http://jpind.pl/userfiles/file/wegarimumajevebibupeso.pdfIn PDF document text
    • https://vishalahospitality.com/ckfinder/userfiles/files/pilitofesoge.pdfIn PDF document text
    • https://baigiangtoanhoc.com/upload/files/35791251217.pdfIn PDF document text
    • http://www.jhannahs.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d8baa9b4a6---78110281033.pdfIn PDF document text
    • http://mojahotels.com/ckfinder/userfiles/files/86584475439.pdfIn PDF document text
    • https://awlights.com/wp-content/plugins/super-forms/uploads/php/files/0e054d8cb0ca87dc901ac8d41c342726/liwawireduwi.pdfIn PDF document text
    • http://xn--80ackbssfuieecff0e8c.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/2nget6c330vsj9juidmtctk7q0/xirenisozadasesavinufejo.pdfIn PDF document text
    • http://af.ssla.ru/images/fornews/files/zirobikonobinulozafeziser.pdfIn PDF document text
    • http://ebsenglish.net/_UploadFile/Images/file/sumubaviwixugefajagaza.pdfIn PDF document text
    • https://zifu-tech.com/app/webroot/userfiles/files/gaxogogorazev.pdfIn PDF document text
    • http://vasvaripalmuzeum.hu/upload/file/bidazexabozagorakegenik.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/PmAiG5ZyT-k/uplcv?utm_term=porque+crecen+los+paises+jose+ignacio+garcia+hamilton+pdfPDF link annotation
    • https://lapdonline.org/file/wotezofukutasaju.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_off0000d4d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD4D2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ece4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECE4 18300 bytes
SHA-256: 1125357a6db291186320b98e15fe5885d95c16fa07ecfe0b479e7f47220a43d1
font_02_sfnt_off00011c1e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C1E 11444 bytes
SHA-256: ade91e5bcaebc79bd6a74889194ef8717fe949c7baec5d8cc25badd910b8c482

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