Malicious PDF — malware analysis report

Static analysis result for SHA-256 ee02eb4d19cb29e4…

MALICIOUS

PDF

74.8 KB Created: 2021-09-20 03:25:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 45407e7c1196f7b2e49058fe620422a6 SHA-1: cfaef7e06a2a4d849c284db828dac24fef3edf94 SHA-256: ee02eb4d19cb29e48ee1094301a571167b91771545e8bde4dcbb181347ee1ac3
156 Risk Score

Malware Insights

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

The PDF file was flagged by ClamAV as a phishing trojan and by an ML classifier as malicious. It contains numerous links, many pointing to compromised WordPress sites or disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of multiple external URIs and link farm heuristics indicates a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9908

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 https://irisapp.cn/uploadfiles/fckeditor/20210904/file/16306913015373.pdf In PDF document text
    • http://www.iqubz.com/wp-content/plugins/formcraft/file-upload/server/content/files/161448055b486a---zujejufilasufoxupi.pdfIn PDF document text
    • http://dent-pro.cz/pic/file/resatitisixatuge.pdfIn PDF document text
    • http://villaturri.it/wp-content/plugins/formcraft/file-upload/server/content/files/16144569674ebd---balimodisuwepu.pdfIn PDF document text
    • http://www.ebsjosepirosamaria.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612f1de525edf---gaxepavabefutorupetutax.pdfIn PDF document text
    • http://christmaslandint.com/userfiles/77898952088.pdfIn PDF document text
    • http://whatcanidoforyou.eu/publish/file/wugivoforoverog.pdfIn PDF document text
    • http://corising.info/sa_upload/userfiles/file/20210917232254.pdfIn PDF document text
    • http://asijskepotraviny.cz/files/file/99247741027.pdfIn PDF document text
    • https://afayl.com/userfiles/file/75588006257.pdfIn PDF document text
    • https://www.lang-mayer.de/wp-content/plugins/formcraft/file-upload/server/content/files/16147a98d9a594---94285681864.pdfIn PDF document text
    • http://mmbc.cz/_data/user_files/file/lazijezizodogowosisuvo.pdfIn PDF document text
    • http://www.vivelamusica.es/wp-content/plugins/formcraft/file-upload/server/content/files/16133d2bd3e2b1---32293186922.pdfIn PDF document text
    • https://www.glasswindowequipment.com/wp-content/plugins/super-forms/uploads/php/files/c46e075aad18f4cb62923a93e82d9c72/26856028894.pdfIn PDF document text
    • http://thestarbusan.net/FileData/ckfinder/files/20210915_F809B7771A642E6A.pdfIn PDF document text
    • https://www.mclarenpress.com/wp-content/plugins/formcraft/file-upload/server/content/files/161305c8dca2a9---11382780131.pdfIn PDF document text
    • http://debsecond.net/UserFiles/File/79401855930.pdfIn PDF document text
    • http://artmetinc.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614164532b9fe---53864076406.pdfIn PDF document text
    • https://markaoyun.com/calisma2/files/uploads/10572854447.pdfIn PDF document text
    • http://101eyewear.com/luutru/files/25488919485.pdfIn PDF document text
    • http://safedoorsystems.com/cmsimages/file/bubeka.pdfIn PDF document text
    • http://araratmebel.ru/img/file/bazuziwatobikumidow.pdfIn PDF document text
    • http://www.schule.havonix.com/ckfinder/userfiles/files/gibirilud.pdfIn PDF document text
    • https://www.ezhealthcheck.com/wp-content/plugins/super-forms/uploads/php/files/fkcvdu017m36mj12qher585pok/wodadikewilorebebe.pdfIn PDF document text
    • http://bertrandetgastineaudesigners.fr/userfiles/file/40250278194.pdfIn PDF document text
    • http://xn--72c7caerxx0d3a9eve.com/UserFiles/File/96916504656.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/zMnd8XtcwSM/uplcv?utm_term=mobile+tracking+apkPDF link annotation
    • 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_off0000c2a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC2A2 16548 bytes
SHA-256: 501979e7b382e67c54d8232cb45bef940075cd71afe907a8dcded7988f1d77b1
font_01_sfnt_off0000ed6e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED6E 10608 bytes
SHA-256: 7b684251ab62c1cc959cc1d42d7bc7da60ef0bba714e57a0640b87da3f5ef710
font_02_sfnt_off00010592.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10592 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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