Malicious PDF — malware analysis report

Static analysis result for SHA-256 7cec5ed8995be92c…

MALICIOUS

PDF

75.6 KB Created: 2021-08-16 09:09:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: d351dfdb58e55f3161f17c163f6101ad SHA-1: c6069ecb5a8d27bba8572c2210c40543d9ed8e7d SHA-256: 7cec5ed8995be92c087920beb679c1681e213e4befcb20395b5444a2dcd484a5
164 Risk Score

Malware Insights

MITRE ATT&CK
T1059.007 JavaScript T1566.001 Spearphishing Attachment

The sample is a PDF containing embedded JavaScript, which is a common technique for exploiting PDF vulnerabilities or redirecting users. Multiple heuristics indicate the PDF acts as a link farm, directing users to numerous distinct hosts, many of which appear to be compromised WordPress sites. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution via these external links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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://catamma.ru/uplcv?utm_term=what+is+the+sentry+safe+factory+code PDF link annotation
    • http://alacarte-grafik.de/userfiles/file/66467439697.pdfIn PDF document text
    • https://grafitpoint.ru/wp-content/plugins/super-forms/uploads/php/files/d23f455fafaa6669255ec488eea265a2/bewugovutimekisivuvukuli.pdfIn PDF document text
    • http://www.onekaddy.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bbc69b06bee---26930515521.pdfIn PDF document text
    • http://velo.hu/UserFiles//file/lotepopalenizada.pdfIn PDF document text
    • https://portsidestrategies.com/wp-content/plugins/super-forms/uploads/php/files/543c8fcc89ab9432004d0464903a3ee5/88310597137.pdfIn PDF document text
    • http://flavourit.com/uploads/userfiles/file/file/mixugofumilobetumi.pdfIn PDF document text
    • http://www.eflox.net/wp-content/plugins/formcraft/file-upload/server/content/files/1607ee19b67ce8---96163455142.pdfIn PDF document text
    • http://sciencevier.com/wp-content/plugins/formcraft/file-upload/server/content/files/161116a292f92b---34204029112.pdfIn PDF document text
    • https://simovi.mx/wp-content/plugins/formcraft/file-upload/server/content/files/160c1c08322c37---gusajiwu.pdfIn PDF document text
    • https://www.18fire.com/wp-content/plugins/super-forms/uploads/php/files/e28cd42a7403247d63b36e3bc9f784b7/newotuge.pdfIn PDF document text
    • http://alpha-th.com/userfiles/file/787462990.pdfIn PDF document text
    • http://epoch-making.jp/js/upload/files/vomepavojijowiv.pdfIn PDF document text
    • https://connatlas.com/home/conn/public_html/ckfinder/userfiles/files/tiwunozawesava.pdfIn PDF document text
    • http://residenceraffaellotorino.com/userfiles/files/botexegamofe.pdfIn PDF document text
    • https://alignerco.com/wp-content/plugins/super-forms/uploads/php/files/ceb66aa5f0380b31f11f93994fc8ba19/22470960172.pdfIn PDF document text
    • http://alphabodysupplements.com/newerac2c/userfiles/file/mirakotuwuvifepuvij.pdfIn PDF document text
    • https://youstore21.com/wp-content/plugins/super-forms/uploads/php/files/af8630e5031fd4eb4eddb7eb1258109b/tosetuvugopinen.pdfIn PDF document text
    • http://www.rec39.ru/wp-content/plugins/super-forms/uploads/php/files/53e18e18413ff27c7cf702896f15d64b/jezasuwo.pdfIn PDF document text
    • https://apparel.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/8537653f178ed2a19aca27e613cfced3/lilenepewevivejela.pdfIn PDF document text
    • http://eros-arena.com/eros/userfiles/file/26520057326.pdfIn PDF document text
    • http://olympusflights.com/files/files/3492719827.pdfIn PDF document text
    • https://aymsoft.us/aym_image/files/zebulelolejuxuxu.pdfIn PDF document text
    • http://eske.hu/wp-content/plugins/formcraft/file-upload/server/content/files/1607dab197a7e6---2498889078.pdfIn PDF document text
    • http://pocatellocampfire.com/wp-content/plugins/super-forms/uploads/php/files/9fadaaatde8dkb69a3kd5sj4s0/24097455607.pdfIn PDF document text
    • http://anvlaw.com/userfiles/file/kibixeviwiliwanowokowas.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_off0000c6a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC6A0 15892 bytes
SHA-256: 1977623b210a24435c14f090f04d81a77220b1beedebd04dca366142f4208003
font_01_sfnt_off0000ef75.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF75 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001078c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1078C 10636 bytes
SHA-256: 6f4e2cff65f818bfb98e49a8a5782a95ec955e0ac7a40e7e60d460d8262e5a7b

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