Malicious PDF — malware analysis report

Static analysis result for SHA-256 eeac9c6f533d069e…

MALICIOUS

PDF

82.9 KB Created: 2021-10-09 09:20:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: f7ec73d1395826b7fd4b717098295772 SHA-1: 5e2ab756c86f8289003603a4aa37ee6bd276c0bd SHA-256: eeac9c6f533d069e1db50019bb5476c5be55570301b98269bf11d5b2d138a9bf
156 Risk Score

Malware Insights

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

The PDF contains numerous links to external websites, many of which are hosted on compromised CMS uploads or disposable hosting, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware delivery. The file's structure and numerous external links point towards an attempt to exploit user trust by directing them to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://laxmigrouppune.com/wp-content/plugins/super-forms/uploads/php/files/b5b9e555513275e3aa31724f7e0d5995/degimalogavas.pdf In PDF document text
    • https://balajihighfields.in/userfiles/file/44889904536.pdfIn PDF document text
    • https://ochronaskory.pl/pliki_user/File/nevibujizekilabafekuxabom.pdfIn PDF document text
    • http://tz5168.com/uploadfile/image/2021/09/23/file/20210923_143558_192.pdfIn PDF document text
    • http://teranor.com/ckfinder/userfiles/files/84749147167.pdfIn PDF document text
    • https://exclusivelimoservice.com/ckfinder/userfiles/files/96364706186.pdfIn PDF document text
    • http://turnwealthy.com/ckfinder/userfiles/files/wukebejegogubakolawuni.pdfIn PDF document text
    • http://pol2-simf.ru/userfiles/file/66967641478.pdfIn PDF document text
    • http://123podkrovie.sk/editor_uploads/files/kusakatu.pdfIn PDF document text
    • https://sensesgrouphk.com/louis/STARKGROUP/ckfinder/userfiles/files/17370099935.pdfIn PDF document text
    • https://ofcourselc.com/admin/uploadsfile/burezuzutilijaxekadokamu.pdfIn PDF document text
    • http://ilksolar.com/Images/Media/files/favaku.pdfIn PDF document text
    • https://sysyanginguvenlik.com/uploads/files/29885683969.pdfIn PDF document text
    • https://www.northamericatalk.com/wp-content/plugins/formcraft/file-upload/server/content/files/161492021f3ea3---36678531241.pdfIn PDF document text
    • https://encouragingmath.com/wp-content/plugins/super-forms/uploads/php/files/9fe9243d42ce205cc86f4002df03e983/nodagir.pdfIn PDF document text
    • http://daydeothe.vn/rich_editor/file/62678245501.pdfIn PDF document text
    • http://studioscoponi.eu/userfiles/files/12576270559.pdfIn PDF document text
    • http://tutaylamhet.com/storage/ckfinder/files/zazopunida.pdfIn PDF document text
    • http://chi-kara.net/userfiles/file/94220986429.pdfIn PDF document text
    • https://louvre.lv/res/wysiwyg/file/98797256935.pdfIn PDF document text
    • http://puzynowska-kancelaria.com/userfiles/file/zixazarasag.pdfIn PDF document text
    • http://itaxabc.com/userfiles/file/20210927104928_1706340862.pdfIn PDF document text
    • https://ecohort.biz/userfiles/files/22537516941.pdfIn PDF document text
    • https://selectwifi.com/wp-content/plugins/formcraft/file-upload/server/content/files/161610e471d849---patibefowafe.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BvfzZFkJO3s/uplcv?utm_term=calories+in+a+chicken+wing+bakedPDF 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_off0000dd64.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD64 10900 bytes
SHA-256: 7f2009251410491b6bdc1a84da8258fe99671984d6dec8c7f089e4b72b021d9d
font_01_sfnt_off0000f663.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF663 18484 bytes
SHA-256: 1936a87cc54dc6b008b711683d7584c822ee260f1158f72a73d24661da08d005
font_02_sfnt_off000125bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x125BF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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