Malicious PDF — malware analysis report

Static analysis result for SHA-256 71d4a21e13ada586…

MALICIOUS

PDF

96.2 KB Created: 2021-08-07 05:10:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 9eb1bb498e786696c218f7fb1adf7997 SHA-1: 38dc75d7fdd049e31de7982e6e81372dfa1ba6f5 SHA-256: 71d4a21e13ada586977f559ce6b56397bde3d255a9295b7ab258502db034a4e5
156 Risk Score

Malware Insights

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

The PDF contains numerous links to external websites, many hosted on compromised WordPress sites or disposable domains, indicating a link farm or phishing lure. The ML classifier and ClamAV detection strongly suggest malicious intent, likely to redirect users to malicious content or phishing pages. Although no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with techniques used to distribute malware or facilitate phishing campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

Heuristics 6

  • 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.
  • 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://drafthe.ru/uplcv?utm_term=trolls+slayer+task+osrs+reddit PDF link annotation
    • http://bettynblue.com/upload/fck_img/20210515/file/mojixadomelupevazu.pdfIn PDF document text
    • http://accomplishtheimpossible.com/userfiles_ati/file/79790907526.pdfIn PDF document text
    • https://him-home.ru/wp-content/plugins/super-forms/uploads/php/files/91d95a9f893f652b952333c9c27c7a83/6208097302.pdfIn PDF document text
    • http://kimyasaldubeller.com/upload/ckfinder/files/sekuligum.pdfIn PDF document text
    • https://funkydrop.shop/wp-content/plugins/super-forms/uploads/php/files/ba5ecd5bad2e4ba2fc47ab5edbacc7bf/95844785375.pdfIn PDF document text
    • https://www.birdandwildlifeteam.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a7655e58342---mogewugola.pdfIn PDF document text
    • https://amatnieks.lv/pictures/image/84803755486.pdfIn PDF document text
    • https://allmassage.net/upload/file/20210514190617.pdfIn PDF document text
    • http://conservationenergy.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a4492de8a2c---vividotejube.pdfIn PDF document text
    • https://wecareu.net/ckfinder/userfiles/files/zezijifigumafogukezeduzi.pdfIn PDF document text
    • https://pielinks.com/UserFiles/file/30689307377.pdfIn PDF document text
    • https://sbmhavacilik.com/userfiles/file/72892843357.pdfIn PDF document text
    • http://bizwd.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607037d39f32a---gupozaluwajike.pdfIn PDF document text
    • https://binarbaidtrading.com/public_html/userfiles/file/59717406990.pdfIn PDF document text
    • http://bonapartefamilynetwork.com/clients/7/7d/7d081654635712149502d88e72c54c2d/File/wegeselikizamew.pdfIn PDF document text
    • https://adbetelparaguay.com/wp-content/plugins/super-forms/uploads/php/files/2b65000eece335b33933d5135c295e25/delisuzuwofemu.pdfIn PDF document text
    • https://dixietemporarystorage.com/wp-content/plugins/super-forms/uploads/php/files/802b57a94073f6566c513f29b5fe6624/fedosagoxufavumigexep.pdfIn PDF document text
    • https://aucordechasse.fr/vosImages/58597280150.pdfIn PDF document text
    • http://narcisse.sk/editor_uploads/files/sugamebil.pdfIn PDF document text
    • http://geodeslaboratori.eu/userfiles/files/92779770501.pdfIn PDF document text
    • https://planet-for-events.de/userfiles/file/rikawuduzujezeba.pdfIn PDF document text
    • http://horizonpestservices.com/userfile/devomufuvuduri.pdfIn PDF document text
    • https://perfecthospital.org/FCKeditor/file/vepage.pdfIn PDF document text
    • http://coral-travel66.ru/admin/ckfinder/userfiles/files/xinujufavakif.pdfIn PDF document text
    • http://bakoca.hu/files/file/siwobesidumavaropokokefu.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_off00011479.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11479 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00012c90.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12C90 10308 bytes
SHA-256: 85e6444f00bacad60545afd1f285dbbf99327627b9bdaade7ac77304c255f6be
font_02_sfnt_off000143f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x143F3 17224 bytes
SHA-256: 7d959049a927665e5d3801eb1d71be10001eb227ad0b9b9870e0369effec5e78

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