Malicious PDF — malware analysis report

Static analysis result for SHA-256 e69a32e005efa73c…

MALICIOUS

PDF

71.6 KB Created: 2021-08-11 15:46:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: ab2fb7c08fba2f48aeb0db1ff80015d7 SHA-1: f10a7d4c13199d72c9ad102b7cf4d940b5bffbb6 SHA-256: e69a32e005efa73cc21dff5eb061c3c083d6793599b7c2083e9195002547aa38
156 Risk Score

Malware Insights

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

The PDF document contains a link farm pointing to multiple compromised WordPress sites and disposable domains, likely intended to trick users into downloading further malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, classifying it as a phishing trojan. The presence of numerous external links suggests a phishing or credential harvesting attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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 http://kokocurry.gm/userfiles/file/lusalatuzidot.pdf In PDF document text
    • http://www.ellisrasbetonwerke.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160917897bad58---97652127815.pdfIn PDF document text
    • https://www.hintonassociates.com/wp-content/plugins/super-forms/uploads/php/files/6cb179b866962e479d8da981d17ed424/womixefil.pdfIn PDF document text
    • http://dooroc.com/tk/upload/file/nugapagafasupirixemox.pdfIn PDF document text
    • http://kenzoum.org/home/integrity/public_html/ckfinder/userfiles/files/redagomabala.pdfIn PDF document text
    • https://alexandrapanayotou.com/web/images/static/file/44641429228.pdfIn PDF document text
    • https://kayakbranson.com/wp-content/plugins/formcraft/file-upload/server/content/files/160dc4bb57b9b6---gatutubuwibigitabobad.pdfIn PDF document text
    • https://stellabakingcompany.com/wp-content/plugins/formcraft/file-upload/server/content/files/160abf856400ed---tatuvunetifarepawup.pdfIn PDF document text
    • http://tuclubcr.com/campannas/file/67816361271.pdfIn PDF document text
    • https://lemanssrl.it/file/xedulerajakezameredufikib.pdfIn PDF document text
    • http://inspiredindianfoundation.org/uploads/nikuninefivorurixusa.pdfIn PDF document text
    • http://chpcentre.com/files/file/67289101306.pdfIn PDF document text
    • https://agilitynd.com/wp-content/plugins/super-forms/uploads/php/files/33972e9a4ab5907ffb06e13947a3a279/90290845271.pdfIn PDF document text
    • https://allianztc.ro/files/file/wisixuwotazuxojegabolew.pdfIn PDF document text
    • http://gnatowski.pl/attachments/file/31851564729.pdfIn PDF document text
    • http://china-zzld.com/uploadfile/file///2021070709102813.pdfIn PDF document text
    • http://whitefamilyreunion2020.org/clients/4/4c/4c64578d40ee165aaf486c9a1ef3309b/File/sadoxujukivinepola.pdfIn PDF document text
    • http://graphicon.hu/wp-content/plugins/formcraft/file-upload/server/content/files/160fb70e09a922---zudutewepu.pdfIn PDF document text
    • http://inezorviskids.com/clients/37546/File/kamebivevinowusatagijomu.pdfIn PDF document text
    • https://home18.ru/wp-content/plugins/super-forms/uploads/php/files/df0ae39d1affa44e8a63f3455ff55668/47506441054.pdfIn PDF document text
    • https://www.officinadelgustoroma.com/wp-content/plugins/super-forms/uploads/php/files/64a03396a5565742c8840e2c9785d596/15868386760.pdfIn PDF document text
    • http://bellezaeimagen.com.mx/wp-content/plugins/formcraft/file-upload/server/content/files/1608a643815015---velorapab.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/S30rS-6n6vg/uplcv?utm_term=tv+olimpo+androidPDF 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_off0000ba2e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBA2E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d240.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD240 15832 bytes
SHA-256: a5793a7c9f791c72f829012444da0b7ddc7036cd86383aded4858ab86ee8fd31
font_02_sfnt_off0000fa18.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA18 10184 bytes
SHA-256: 23e5ea83116e57a0847e2c74b32ae72049004d1a324bd62392a7341325d8c9cf

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