Malicious PDF — malware analysis report

Static analysis result for SHA-256 f7206d3e9be127b3…

MALICIOUS

PDF

86.0 KB Created: 2021-09-21 07:30:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 58888589232e54854929a6bd1489ea94 SHA-1: f6aae4c5c531592a79402b02521a76f5b3503db6 SHA-256: f7206d3e9be127b3fc08f8bc7d73468a1737ff78dbf79abd48ea148afc622259
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It functions as a link farm, containing numerous URLs that point to compromised websites and disposable hosting, likely to redirect users to phishing sites or download further malware. The presence of external URIs and link farm heuristics strongly suggests a spearphishing attachment attack vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

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://inwebjor.ru/uplcv?utm_term=adam+khoo+winning+the+game+of+stocks+pdf PDF link annotation
    • https://ferado.vn/userfiles/file/sirolifowakug.pdfIn PDF document text
    • http://www.hcibatiment.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1613a6b6b84123---zupukila.pdfIn PDF document text
    • https://optimuselearningschool.com/learning/site/images/uploadfiles/xolubaj.pdfIn PDF document text
    • http://lncxjzxxw.com/upload_fck/file/2021-9-11/20210911191239223608.pdfIn PDF document text
    • http://tearose-kitchen.com/sites/default/files/images/imcefile/61530236953.pdfIn PDF document text
    • http://kavernoklub.com/campannas/file/fafufonodepukojipomof.pdfIn PDF document text
    • http://nhakhoasaigonkimcuong.com/uploads/images/files/xixiduzom.pdfIn PDF document text
    • http://www.tenniscanberra.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16142615f6f469---rokopilumivimojemexivipat.pdfIn PDF document text
    • http://tea-ra.com/user_data/upload/save_image/files/nawolabive.pdfIn PDF document text
    • http://partner-support.net/user_data/userfiles/files/libesobivodimokiwafebu.pdfIn PDF document text
    • http://turar-mussin.com/userfiles/File/jidopujuzurijop.pdfIn PDF document text
    • http://bjxbw.cn/userfiles/file/tojeza.pdfIn PDF document text
    • http://electrogalicia.com/electrogalicia/recursos/archivos/luvuv.pdfIn PDF document text
    • https://www.ciabrini-immobilier.com/wp-content/plugins/super-forms/uploads/php/files/g21hsbv2lronolh8bqv379j58s/wiribapotedinul.pdfIn PDF document text
    • https://onderdurdu.com/upload/ckfinder/files/kuvetilulabepifizimagaxi.pdfIn PDF document text
    • http://moyamoya.center/images/hand_uploaded/files/9119069001.pdfIn PDF document text
    • http://yksskj.com/ckfinder/userfiles/files/zamenemudomu.pdfIn PDF document text
    • http://flixgolf.com/ckeditor/ckfinder/userfiles/files/45426278466.pdfIn PDF document text
    • https://www.grandeprairie.org/wp-content/plugins/formcraft/file-upload/server/content/files/1614933d443b8b---zopukuwoj.pdfIn PDF document text
    • http://pressvaluation.net/FCKeditor/editor/filemanager/connectors/userfiles/file/53467006622.pdfIn PDF document text
    • http://cheers-gifts.com/userfiles/76747603467.pdfIn PDF document text
    • https://ngonluathan.vn/images/ckeditor/files/rinefutuno.pdfIn PDF document text
    • http://internet-trade.eu/UserFiles/file/88360825129.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_off0000e5bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5BB 19308 bytes
SHA-256: 6db21ec6cea1532467ac696b32b195219a330220741272f62652a78c143f9ce3
font_01_sfnt_off0001185d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1185D 11080 bytes
SHA-256: 886fa87ed7e503a52fef1f43d52c066ec2e2567521aff0d0b9e541e4b7cb6ac4
font_02_sfnt_off000131ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x131EE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.