Malicious PDF — malware analysis report

Static analysis result for SHA-256 be4e973f48892b4e…

MALICIOUS

PDF

79.6 KB Created: 2021-09-06 15:31:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 212347aba529ff9ee5691fdd74debe8f SHA-1: f55af7213d57408301d15d1f7812f186749c51ae SHA-256: be4e973f48892b4e65b76cc262601e707c8b650064ddc2113490b733efe4df98
164 Risk Score

Malware Insights

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

This PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, many pointing to compromised WordPress sites, suggesting it's designed to lure users to malicious destinations. The presence of a 'download button' heuristic further supports a deceptive user interaction workflow.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://crysiq.ru/uplcv?utm_term=pdf+fusionner+pages+paires+impaires PDF link annotation
    • http://gustosandvic.com/ckfinder/userfiles/files/lakiwoter.pdfIn PDF document text
    • https://thriveelearning.com/wp-content/plugins/super-forms/uploads/php/files/f0308e9be20693facf54116c74e4cb89/75286723970.pdfIn PDF document text
    • http://bdpq.hungminhits.com/files/uploaded/files/50600535363.pdfIn PDF document text
    • http://zxpgw.com/userfiles/file/gepiviwabovewilufe.pdfIn PDF document text
    • https://carstenrath.com/wp-content/plugins/super-forms/uploads/php/files/cup1sqj8svhdbvunue844f3cnl/24949870895.pdfIn PDF document text
    • http://besteva.com/upload/files/14581715947.pdfIn PDF document text
    • https://www.ferienhof-schneider.de/wp-content/plugins/formcraft/file-upload/server/content/files/160718a046e0e4---milokevapepimudawukapet.pdfIn PDF document text
    • http://worksafeorg.com/wp-content/plugins/super-forms/uploads/php/files/12v38ja1e65umn78jb8pi9glk5/zifagibot.pdfIn PDF document text
    • http://goddesshair.net/upload/users/files/lubimizorewonarej.pdfIn PDF document text
    • http://kochamsushi.pl/UserFiles/file/pugoxiv.pdfIn PDF document text
    • http://www.sunargrup.com.tr/wp-content/plugins/super-forms/uploads/php/files/3c8md0o29js67a2lntd77s8op3/popenakubutubegorexasagi.pdfIn PDF document text
    • http://dodici12.ru/wp-content/plugins/super-forms/uploads/php/files/a3knp5so63j13ga28lmqv68qr6/73084207596.pdfIn PDF document text
    • http://www.kindytennis.com/wp-content/plugins/formcraft/file-upload/server/content/files/16099f7d2afd51---buvosunerixijiwetanem.pdfIn PDF document text
    • http://braintradingbcn.com/wp-content/plugins/super-forms/uploads/php/files/026799ae7e3d0a666e5111fa1c3ff7a8/berukugopubove.pdfIn PDF document text
    • https://njsolarpower.com/wp-content/plugins/super-forms/uploads/php/files/f1e5692281a5f3b5ff9f21642916f182/70052175983.pdfIn PDF document text
    • http://euskararenginkana.eus/files/galeria/files/1301901919.pdfIn PDF document text
    • https://g55net.com/webpagebuilder/ckfinder/userfiles/files/dazepisaguzi.pdfIn PDF document text
    • https://carlojans.com/cms/file/bozusijixumubodofekilabe.pdfIn PDF document text
    • http://maekalocal.com/Maeka/UserFiles/File/39293256626.pdfIn PDF document text
    • http://harchovyk.com/userfiles/file/2412881050.pdfIn PDF document text
    • https://avenirpourtous.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160a6c55a72cbf---vixizixanomebopuwed.pdfIn PDF document text
    • http://twfbs.com/ckfinder/userfiles/files/21692261493.pdfIn PDF document text
    • https://anzmrrn.org/wp-content/plugins/formcraft/file-upload/server/content/files/16085aecdb2a3e---kizovobije.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_off0000d2ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD2FF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000eb16.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB16 10800 bytes
SHA-256: 341f5b566e52aedd84a9bc82645fb0532e9088d5c5e59f6d510004a88bb5d4e7
font_02_sfnt_off000103b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103B8 17476 bytes
SHA-256: 4b54e6f0f55ff4ebcf6729d63bcd4f993bafce114cda6061eaf7f089bed803b4

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