Malicious PDF — malware analysis report

Static analysis result for SHA-256 1cf02ac7e3c8fe0f…

MALICIOUS

PDF

78.0 KB Created: 2021-09-11 02:24:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 2abd1b6f64fab1a85e58e3ae47c1efd8 SHA-1: 454762994eb20e6b6d644aca5321050ba2307ce0 SHA-256: 1cf02ac7e3c8fe0fd712be543eb491f787fbb534e97e612269095718befc80c8
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics as malicious, including a ML classifier and ClamAV, indicating it is likely a phishing or malware distribution lure. The PDF contains a link farm pointing to numerous external URLs, many hosted on compromised websites or disposable domains, suggesting an attempt to direct users to malicious content. Although no scripts were explicitly extracted, the nature of the link farm and the PDF's structure suggest it may leverage embedded JavaScript for redirection or further payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9917

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://www.infratechgroep.nl/wp-content/plugins/super-forms/uploads/php/files/4e3e2f0e315eea11d06fabcfbce02101/41161215492.pdf In PDF document text
    • https://ms2oke.com/contents/files/27673598303.pdfIn PDF document text
    • http://artwatch.ru/userfiles/file/zuvopo.pdfIn PDF document text
    • http://winteringlawoffice.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/29600490090.pdfIn PDF document text
    • http://lltsg.com/uploadfile/file///2021090201161938.pdfIn PDF document text
    • http://www.salac.cz/ckfinder/userfiles/files/gizekuwepivanubujapam.pdfIn PDF document text
    • http://jatechkj.pl/upload/fck/file/xasaxusolijoz.pdfIn PDF document text
    • http://localhomesales.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1612f6bba5bf29---81267615471.pdfIn PDF document text
    • https://endobible.com/userfiles/file/rezevivevipenevanebegud.pdfIn PDF document text
    • http://xn--b1akwe.xn--p1ai/userfiles/file/46128071802.pdfIn PDF document text
    • https://stayinbranson.com/ckfinder/triplebuserfiles/file/84742438981.pdfIn PDF document text
    • http://full814.com/upload/files/runekiba.pdfIn PDF document text
    • http://cn-noah.com/uploadfile/file/dilufiwunupugudipafam.pdfIn PDF document text
    • http://camelliafb.com/uploads/files/202109020304258221.pdfIn PDF document text
    • http://www.malagatour.es/ckfinder/userfiles/files/56026077134.pdfIn PDF document text
    • https://stewsites.com/wp-content/plugins/super-forms/uploads/php/files/01b6d6bac06f28d780990347894ffaaa/lakiziwegafamupolamepume.pdfIn PDF document text
    • http://www.tsssport.com/wp-content/plugins/formcraft/file-upload/server/content/files/16133bfb0e9b14---zixal.pdfIn PDF document text
    • http://princeworldwide.com/multimedia/userfiles/file/faxal.pdfIn PDF document text
    • http://ohsongpharm.com/ckfinder/userfiles/files/vasatatib.pdfIn PDF document text
    • http://songhakbbq.com/uploads/files/39432879147.pdfIn PDF document text
    • http://clubselectionvoyages.com/images/file/mujorerevufalulemawoji.pdfIn PDF document text
    • https://www.intermediastudios.com.mx/wp-content/plugins/super-forms/uploads/php/files/d7efd91a89f148bbb54c22c05473a551/zepedomeziresegetepa.pdfIn PDF document text
    • https://houstoncoinshow.org/FCKeditor/file/kolelivojusi.pdfIn PDF document text
    • http://aptekainternetowa.net/_mdm_apteki/file/70823878089.pdfIn PDF document text
    • http://artkulinaria.pl/sites/default/files/file/41477557171.pdfIn PDF document text
    • http://cyuanmei.com/userfiles/file/53686230299.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3CAf4wW3hvY/uplcv?utm_term=ketones+10+day+challenge+resultsPDF 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_off0000c8e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC8E1 10936 bytes
SHA-256: b01b70a593fa0025b1f5dacee9ea3be4123b76e2eda3ab50facc5099a7719c01
font_01_sfnt_off0000e219.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE219 18576 bytes
SHA-256: 701859a679e0360b03f74896c26d6fe90c46140a96ed5bfb3d189b273ae3116a
font_02_sfnt_off00011210.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11210 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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