Malicious PDF — malware analysis report

Static analysis result for SHA-256 e2cc6ab4f9bd79b1…

MALICIOUS

PDF

79.6 KB Created: 2021-09-19 03:22:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: b1e8e89c021ffa01dc652819841959bc SHA-1: 1a03b2b45ac54ce853844089fcb06fff8c298b81 SHA-256: e2cc6ab4f9bd79b1d3f172071c15b27ed6cffc6201402187701a9e981c120e20
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external URIs, many of which point to compromised WordPress sites acting as link farms. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to redirect users to phishing or malware hosting sites. The embedded JavaScript is a common technique for initiating malicious actions within PDF documents.

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://philabc.ru/uplcv?utm_term=nobel+32me7+price+in+pakistan PDF link annotation
    • https://infravoip.com/wp-content/plugins/super-forms/uploads/php/files/310222a0371c36384ee6c63b4535a35d/tojirisomozofejuxi.pdfIn PDF document text
    • https://windsbs.biz/files/file/susakuputesisuzizakisivux.pdfIn PDF document text
    • https://rh-h1tapi-turbo.com/contents/files/36185054491.pdfIn PDF document text
    • http://grani-tonkogo-mira.ru/wp-content/plugins/super-forms/uploads/php/files/6ae687afe0bfeb60f7938589452defae/2813765165.pdfIn PDF document text
    • http://multiseal.com.ph/wp-content/plugins/formcraft/file-upload/server/content/files/16136f6797ca47---fizidijafizipoju.pdfIn PDF document text
    • http://espwireless.net/uploads/file/sipobegujobitunenele.pdfIn PDF document text
    • http://lacasedescaraibes.fr/file/55112169029.pdfIn PDF document text
    • http://markone-tools.com/upload/files/48807215301.pdfIn PDF document text
    • http://euhoca.com/js/ckfinder/userfiles/files/keren.pdfIn PDF document text
    • https://levin-dent.ru/wp-content/plugins/super-forms/uploads/php/files/7f2029924367bdd0d9e59569799d8691/ragodakolajilaxino.pdfIn PDF document text
    • http://shangyi-pump.com/uploads/file/071559048275.pdfIn PDF document text
    • http://musik-fachberatung-neumarkt.de/images/uploadedimages/file/23310700320.pdfIn PDF document text
    • http://thesnowmanicecream.com/ckfinder/userfiles/files/45147653386.pdfIn PDF document text
    • http://fra2ange.it/userfiles/files/82319659391.pdfIn PDF document text
    • http://coaching-scolaire.net/userfiles/file/95558641626.pdfIn PDF document text
    • http://cassotech.nl/site/data/ws/files/jazeseduvi.pdfIn PDF document text
    • https://piauiaqui.com/ckfinder/files/xurizokadaz.pdfIn PDF document text
    • http://namhungholdings.com/uploads/ckfinder/files/15151160101.pdfIn PDF document text
    • https://saatyapi.com/upload/ckfinder/files/72751497380.pdfIn PDF document text
    • https://duvanco.be/docs/files/49546222017.pdfIn PDF document text
    • http://flex-link.cn/uploadfiles/files/xokukewopelagopi.pdfIn PDF document text
    • https://felicityokolo.com/file/44269511044.pdfIn PDF document text
    • http://hocomesun.com/upload/39573320112.pdfIn PDF document text
    • http://vidol.nl/userfiles/file/65377157087.pdfIn PDF document text
    • http://licausi.it/userfiles/files/lovinonaw.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_off0000cf78.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF78 17708 bytes
SHA-256: 322d4bebba5a24852ef56dfefe5a39642a090d868c74fbbe95e09259192e7e66
font_01_sfnt_off0000fd52.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD52 11088 bytes
SHA-256: 77e6fee4519d7f68d90f42ce6878df21246f26f3e928231d63c882686d1e1ffb
font_02_sfnt_off00011714.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11714 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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