Malicious PDF — malware analysis report

Static analysis result for SHA-256 6b1ce63a6a18dd07…

MALICIOUS

PDF

80.0 KB Created: 2021-09-22 13:10:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: e62e1ebdc1fb84700c705b5e23c09811 SHA-1: 78c5fd6fd19785cd6d6900d2c934ad7a1cd48a38 SHA-256: 6b1ce63a6a18dd0754f36a309e1ef46d5e0dd456a7aab17e9037bdf70b4032bd
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. It contains numerous links, many pointing to compromised CMS uploads and disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of embedded URLs and the 'QR-code redirect lure' heuristic indicate an attempt to trick users into navigating to external, potentially harmful, sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

Heuristics 7

  • 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.
  • QR-code redirect lure medium SE_QR_LURE
    Document instructs the user to scan a QR code with a phone — consistent with QR phishing, but also common in legitimate documents
  • 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://technok.cz/wp-content/plugins/super-forms/uploads/php/files/54cb32903d1db3ead3b362353654368a/975010352.pdf In PDF document text
    • http://modamoda.nl/uploads/pic_lib/file/dugozuwigenudeno.pdfIn PDF document text
    • http://gaestehaus-am-erlkoenig.de/img/editor/file/nekiwobadow.pdfIn PDF document text
    • http://bagpack.com.np/wp-content/plugins/formcraft/file-upload/server/content/files/16137d96b096a9---24441049653.pdfIn PDF document text
    • http://noahmission.org/dataroom/file/xuzapunakafig.pdfIn PDF document text
    • http://www.timtransportes.com/home/wp-content/plugins/formcraft/file-upload/server/content/files/16142bb678c11c---votofusop.pdfIn PDF document text
    • https://truongthanhco.vn/webroot/img/files/43058208685.pdfIn PDF document text
    • http://omatsuri.kr/data/userfiles/files/6960592383.pdfIn PDF document text
    • http://bzws.zhanyougame.com/ckfinder/userfiles/files/dinegavawizelopotekitar.pdfIn PDF document text
    • https://netiko.fr/img/Data/file/tojigitunewiseguvi.pdfIn PDF document text
    • https://nutricount.cz/UserFiles/File/zozukezef.pdfIn PDF document text
    • https://premiumvipbusiness.com/wp-content/plugins/super-forms/uploads/php/files/3e162d5549bc67a607c5ad91084113a0/76158961735.pdfIn PDF document text
    • http://buren-kompanie.de/userfiles/files/22403865685.pdfIn PDF document text
    • http://pzhjintai.com/upload/files/69122718674.pdfIn PDF document text
    • http://ck-tct.ru/userfiles/file/bovekiwowoxosutajebera.pdfIn PDF document text
    • https://goodline.by/userfiles/file/34740154698.pdfIn PDF document text
    • http://aj-freight.com/ckfinder/userfiles/files/sadaremanamiwowikeb.pdfIn PDF document text
    • http://xahscw.com/userfiles/file/xexefaj.pdfIn PDF document text
    • https://habibitours.net/ckfinder/userfiles/files/rinokegesomerosasadodi.pdfIn PDF document text
    • https://rapn.ru/ckfinder/userfiles/files/pakez.pdfIn PDF document text
    • http://queenart.kr/userData/board/file/ribodanev.pdfIn PDF document text
    • http://sportingclubalbinia.eu/userfiles/files/jiguzusekopute.pdfIn PDF document text
    • http://namadagaskare.ru/ckfinder/userfiles/files/31829259963.pdfIn PDF document text
    • http://zhongjiukeji.com/upload_fck/file/2021-9-18/20210918140442718563.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/LPIa9PGmDLg/uplcv?utm_term=what+is+my+android+ap+passwordPDF 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_off0000d403.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD403 17696 bytes
SHA-256: 3488bcc2fd6ccf327e90b374cf2f5d0a638f691413d1d3e403ed838c0d6e3905
font_01_sfnt_off000101c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101C5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000119dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x119DC 10672 bytes
SHA-256: 1b47057baa74289b79d2193862e1547e993733218e862962eeba6aa260f669de

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