Malicious PDF — malware analysis report

Static analysis result for SHA-256 ace2b0b5a57b28a0…

MALICIOUS

PDF

78.6 KB Created: 2021-06-27 01:44:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: 48ef1ec3fae6b23ba293924b6202322b SHA-1: ccf5de931a7d591ce17744b558e1f5faa74e053b SHA-256: ace2b0b5a57b28a0c65cd65c93f6bae238e1b03fa10766e6e83452ffd5765598
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript, which is a common technique for executing malicious code. The document also features a link farm pointing to multiple compromised WordPress sites, suggesting an attempt to host malicious content or redirect users. ClamAV detection and ML classification further support its malicious nature, likely as a phishing or malware delivery mechanism.

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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://eandjfamilyhealthcenter.com/wp-content/plugins/super-forms/uploads/php/files/91e2ba11920f4a969b07707c6be7a68a/60206227266.pdf In PDF document text
    • https://hogies.com/includes/template/uploads/file/tufukamimezodelitidipa.pdfIn PDF document text
    • https://abe-rdc.com/userfiles/file/parizuvufowugom.pdfIn PDF document text
    • https://amartzon.store/wp-content/plugins/super-forms/uploads/php/files/e9aee333a8bfd6b2ccca6dba8fda1edf/67556490452.pdfIn PDF document text
    • https://boumqueur-edition.com/upload/fckeditor/file/nisuwured.pdfIn PDF document text
    • https://www.tifdip.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c3df113103f---35811206211.pdfIn PDF document text
    • http://www.canadiantreasurer.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b07331e6d9---dixizesemov.pdfIn PDF document text
    • https://www.jahnigterbraak.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160c8ab3db14f2---belomukupururafilun.pdfIn PDF document text
    • http://gpszone.hu/upload/userfiles/file/vowagobumejajatutumafe.pdfIn PDF document text
    • http://mas.vacations/wp-content/plugins/formcraft/file-upload/server/content/files/16084592e47e8d---9217903613.pdfIn PDF document text
    • https://a2designbg.com/userfiles/file/konunevawe.pdfIn PDF document text
    • https://cissud.com/uploads/ck_editor/files/munudaravadanuwu.pdfIn PDF document text
    • http://inewbus.com/wp-content/plugins/super-forms/uploads/php/files/628kr4bmpk4kd1eqr522vjbtv7/bofadelabafe.pdfIn PDF document text
    • https://panegovernance.com/ourprojects/chowki/UserFiles/file/33487602987.pdfIn PDF document text
    • https://sharidendesignasphalt.com/wp-content/plugins/super-forms/uploads/php/files/53061cb54c6e3493e8fd394ed6ff9cdb/sezulovo.pdfIn PDF document text
    • http://language-coach.pl/uploads/files/38727920879.pdfIn PDF document text
    • http://sincaremedicaltour.com/js/upload/36472187718.pdfIn PDF document text
    • https://dongytueduc.com/wp-content/plugins/super-forms/uploads/php/files/1rre6856n5airk2vu0nkrcr29v/pasemamojovokamibujisofa.pdfIn PDF document text
    • http://www.expo-hotel.com/english/wp-content/plugins/formcraft/file-upload/server/content/files/160ac3de76e694---72942636686.pdfIn PDF document text
    • http://geyikkimya.com/userfiles/upload/file/61276775185.pdfIn PDF document text
    • http://perfectthesale.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607da76077dfb---futunuzojolefesonan.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1xuhb7AK25c/uplcv?utm_term=phyllis+hyman+living+inside+your+lovePDF 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_off0000ce68.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE68 10880 bytes
SHA-256: 7212f0889be0a659d73b8d9169a2f409e5959a9d7d0734ee7587122fe3e219d1
font_01_sfnt_off0000e71f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE71F 18024 bytes
SHA-256: 7843c557a37faef6144dbbf245ce500adc0bb43ee8855f0d4baab33d5b63d9c4
font_02_sfnt_off00011565.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11565 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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