Malicious PDF — malware analysis report

Static analysis result for SHA-256 e1e44e8f812c8454…

MALICIOUS

PDF

89.3 KB Created: 2021-08-14 00:58:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-17
MD5: 114b0016c3d6f4e529cd913e22b04fc7 SHA-1: 1e61c1a2d5f8e6653bce45593b82694441547e8e SHA-256: e1e44e8f812c8454cdc8814ca8cf76d4f9efe513610f00e69b4fb13c65bf6b80
204 Risk Score

Malware Insights

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

The PDF contains embedded JavaScript and multiple external links, some pointing to compromised WordPress sites, indicating an attempt to redirect users to malicious content. The heuristic 'SE_BRAND_CREDENTIAL_PHISH' specifically flags this as an eBay credential phishing lure, suggesting the embedded JavaScript likely facilitates the redirection to a phishing page. The ClamAV detection further confirms its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9979

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Brand-impersonation credential phishing lure high SE_BRAND_CREDENTIAL_PHISH
    Document impersonates a well-known consumer brand and uses account-security / verification language ('unusual activity', 'account on hold', 'verify your account') to steer the reader to a credential-harvesting link. Corroborated by: call-to-action link host does not match the impersonated brand: https://feedproxy.google.com/~r/skout/mBVl/~3/1KS0DP0cxss/uplcv?utm_term=what+is+the+code+for+epics+in+prodigy.
  • 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://dineflon.com//files/71030745157.pdf In PDF document text
    • http://dpsszczytno.pl/photo/file/40098934458.pdfIn PDF document text
    • http://cetinelektrik.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/16071e014d9997---fewefuforutog.pdfIn PDF document text
    • https://ddriu.hu/wp-content/plugins/super-forms/uploads/php/files/9fbaeefa354fb76656d44411ea17a606/4579529418.pdfIn PDF document text
    • https://simovi.mx/wp-content/plugins/formcraft/file-upload/server/content/files/16086d2455624c---wugifiwegesesipoduwadud.pdfIn PDF document text
    • http://aarogyamedico.com/userfiles/file/82483826031.pdfIn PDF document text
    • http://amon-syotengai.com/userfiles/file/vowudunuvixinokutopusolo.pdfIn PDF document text
    • https://www.electriclighting.com/wp-content/plugins/super-forms/uploads/php/files/f3c543d53a9fc0c46e9b27c83cde249c/jonititesafatixuja.pdfIn PDF document text
    • https://discoverapartmentsforrent.com/wp-content/plugins/super-forms/uploads/php/files/13fee77d162293239d12dac8de584202/18695855912.pdfIn PDF document text
    • http://www.adanakursmerkezi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608a973ec3878---67464901545.pdfIn PDF document text
    • https://rhythmcprandfirstaid.com/wp-content/plugins/super-forms/uploads/php/files/5a491e06b1ed65a49eb24f9af9fc2f09/53874606619.pdfIn PDF document text
    • http://pumarecovery.com/userfiles/files/36684688014.pdfIn PDF document text
    • http://pascalparrot.com/uploads/assets/file/wafofoxenofatu.pdfIn PDF document text
    • http://abwmercury.com/uploads/files/zedimozomivimupen.pdfIn PDF document text
    • http://serextion2006.com/js/upload/files/vefipir.pdfIn PDF document text
    • http://orderkiwicafe.com/uploads/files/94213343643.pdfIn PDF document text
    • http://soundreaming.org/wp-content/plugins/super-forms/uploads/php/files/fd4baac36101aba5674eede2c23ff2c9/satoribibik.pdfIn PDF document text
    • http://anysoldierfundraiser.com/clients/a/af/af293656121fcb8b60a8c910089dd81c/File/sizaxulovutovu.pdfIn PDF document text
    • http://cz-synergy.cz/data/file/58376646128.pdfIn PDF document text
    • http://locthanhroyal.com/upload/files/pedelinazipusikumigurulol.pdfIn PDF document text
    • https://dbjadow.pl/attachments/file/jujoloropazipuxiw.pdfIn PDF document text
    • https://btcauction.vn/hinhanh/file/jafaboximamugajoxag.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1KS0DP0cxss/uplcv?utm_term=what+is+the+code+for+epics+in+prodigyPDF 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_off0000f777.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF777 10960 bytes
SHA-256: 4f3e17d1f064c5a24cb07783e4a40fc91b7f206104490460c39221d3a38d66de
font_01_sfnt_off000110af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x110AF 17880 bytes
SHA-256: ace181ef8a196b2ab39cc69e14b2e32ed9da8632a9873e99c121dd499d679ca9
font_02_sfnt_off00013f9a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13F9A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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