Malicious PDF — malware analysis report

Static analysis result for SHA-256 bbeb7741de676f4e…

MALICIOUS

PDF

70.4 KB Created: 2021-09-25 05:45:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: f78542f993b5b138b078b793099da52c SHA-1: de071c389fd06f78e684a21415aad14d76692e36 SHA-256: bbeb7741de676f4e6e7f9b497a271917997ed15d29d8fde62ad0efdc734821b4
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF is identified as a phishing lure due to its image-only nature and embedded clickable links. The heuristic 'PDF_IMAGE_LURE' indicates a common tactic where a screenshot is used to hide an action trigger. Multiple URLs are present, including links to compromised WordPress uploads and disposable hosting, suggesting an attempt to redirect users to malicious content. The ClamAV detection further supports its malicious classification.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9849

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
  • Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 1 image(s), only 1 text block(s), carries a click-outward action, and is only 70 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • 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=take+me+to+church+hozier+mp3+song+free+download PDF link annotation
    • http://pinxedien.net/upload/files/ximevifumagenos.pdfIn PDF document text
    • http://lamachine.nl/userfiles/file/zitetovusoxububipugod.pdfIn PDF document text
    • https://beldapromosyon.com/calisma2/files/uploads/zigutisaminanexixuxi.pdfIn PDF document text
    • https://amzentransportationindustries.com/admin/imagetemp1/file/71232288522.pdfIn PDF document text
    • http://execdentalclinic.com/uploads/ckfinder/userfiles/files/60679029702.pdfIn PDF document text
    • http://metabolit.ru/files/file/junogemopafujamok.pdfIn PDF document text
    • https://marblo.com/app/webroot/img/files/nexelufafexim.pdfIn PDF document text
    • http://www.grundys.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/161395a2277441---61943889301.pdfIn PDF document text
    • http://veszpremkosar.hu/_user/file/kexerowulavofo.pdfIn PDF document text
    • http://www.hkwebdesign.com.hk/wp-content/plugins/formcraft/file-upload/server/content/files/1614ca64051119---31058624520.pdfIn PDF document text
    • http://bbfrontedelmare.com/userfiles/files/21491967151.pdfIn PDF document text
    • http://leap-egypt.com/wp-content/plugins/formcraft/file-upload/server/content/files/161300a50e6aa5---49923557461.pdfIn PDF document text
    • http://kenzoum.org/home/integrity/public_html/ckfinder/userfiles/files/tuvekajesumud.pdfIn PDF document text
    • http://webcertain.ca/contentupload/fckeditorUploads/organization_/file/vunaxevexijan.pdfIn PDF document text
    • https://ariaparvaz.com/basefile/ariaparvazcom/files/xokuparafafajifisiboz.pdfIn PDF document text
    • https://eguiders.com/uploads/10650655681.pdfIn PDF document text
    • http://miryangpension.com/FileData/ckfinder/files/20210901_22EE9D2682CD9BA0.pdfIn PDF document text
    • http://truhlarstvi-strakonice.cz/files/file/revenunonafo.pdfIn PDF document text
    • http://quangcaosmsgiare.com/media/ftp/file/80130913137.pdfIn PDF document text
    • https://zniczekowalczyk.com/user_images/file/28040498040.pdfIn PDF document text
    • https://sunsoftinfoway.net/ckfinder/userfiles/files/xobavagerowewipokijemeti.pdfIn PDF document text
    • https://hatinhjobs.com/upload/files/59130230965.pdfIn PDF document text
    • http://safarang.com/basefile/files/juruzaka.pdfIn PDF document text
    • http://vasekurzy.cz/userfiles/file/daponojasudofomovufudu.pdfIn PDF document text
    • http://tobn56.com/UpFiles/file/46719615868.pdfIn PDF document text
    • http://frankifoto.com/uploads/pages/files/35565322236.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_off0000b1b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB1B9 11540 bytes
SHA-256: dad231acb0536d3e5ae08c4c8ae21dc17f859e43bf0e8d9d5e07a8492ad2f340
font_01_sfnt_off0000ccd5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCCD5 14616 bytes
SHA-256: 348ffd5f911d94f14881dc3c0dd4049985499c28910e8478938d32e8dc839c5a
font_02_sfnt_off0000f164.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF164 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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