Malicious PDF — malware analysis report

Static analysis result for SHA-256 c960e648551953f9…

MALICIOUS

PDF

68.5 KB Created: 2021-09-10 05:05:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 92db4ca4471e201fb99baaed94b9836e SHA-1: 356e0bafb2bbb241f2f0f65e166e2028455a2bc2 SHA-256: c960e648551953f9de35a47a75f43381ef351705503f3caca398356dcde4e1be
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF is identified as a phishing lure due to its small size and image-only content, typical of a screenshot designed to hide clickable elements. It contains numerous links pointing to compromised CMS uploads and disposable hosting, suggesting an attempt to redirect users to malicious sites. While no scripts were directly extracted, the PDF structure and link farm indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9849

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
  • Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 1 image(s), only 0 text block(s), carries a click-outward action, and is only 68 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 http://dga.gr/ILC/img/file/78088226847.pdf In PDF document text
    • http://gniortho.com/files/Upload/file/zoxexizejupozulisu.pdfIn PDF document text
    • http://khmim.com/ckfinder/userfiles/files/wejunalavamevu.pdfIn PDF document text
    • https://yellowstonewildlife.com/1943833357.pdfIn PDF document text
    • http://prime-standard.com/piceditor/file/gakulemegobelosewarazosos.pdfIn PDF document text
    • https://www.brunosistemi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613959432e539---95979431353.pdfIn PDF document text
    • http://hattrick-sports.com/wp-content/plugins/formcraft/file-upload/server/content/files/16130665e2592c---42086093963.pdfIn PDF document text
    • http://supair-lux.hu/ckfinder/userfiles/files/602842512.pdfIn PDF document text
    • https://boyanbolyarski.com/userfiles/file/23687390883.pdfIn PDF document text
    • https://zapcdn.space/web/img/podborky/files/pedemededev.pdfIn PDF document text
    • http://semihkerpiccilervesupersound.com/upload/file/73909329496.pdfIn PDF document text
    • http://maxitelt.no/wp-content/plugins/formcraft/file-upload/server/content/files/16134f7b8ca291---zafeti.pdfIn PDF document text
    • https://people11people.gr/uploads/File/sijorojopud.pdfIn PDF document text
    • http://bloemenwinkelindex.nl/images/uploads/14434796889.pdfIn PDF document text
    • https://reifenscho.de/wp-content/plugins/formcraft/file-upload/server/content/files/1613244670bdc6---81392973130.pdfIn PDF document text
    • https://1000families.eu/userfiles/file/sizaw.pdfIn PDF document text
    • http://nguoigiupviec99.com/webroot/img/files/karadejokakeperisigaki.pdfIn PDF document text
    • http://straps.by/ckfinder/userfiles/files/dilufevewikedivirudasina.pdfIn PDF document text
    • http://dastone.ru/userfiles/file/wexerofomiwipozasegiso.pdfIn PDF document text
    • https://izharfoster.com/wp-content/plugins/formcraft/file-upload/server/content/files/161304128e729e---midowoxujovosodobaxolepo.pdfIn PDF document text
    • http://palletgoanloi.com/img-dn/files/93480259685.pdfIn PDF document text
    • http://rootbeadmill.com/upload_fck/file/2021-9-7/20210907140320554442.pdfIn PDF document text
    • https://thic.net/plugin/ce1/ckfinder/userfiles/files/zanovonokujejunopojolaziw.pdfIn PDF document text
    • http://prograsifkalip.com/files/92688309513.pdfIn PDF document text
    • http://patp1ryb.ru/media/file/20456402666.pdfIn PDF document text
    • https://mimpishio2bet.com/contents/files/3433559173.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/DOqCt-cVA4I/uplcv?utm_term=god+of+war+mobile+androidPDF link annotation
    • 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_off0000b1c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB1C2 10512 bytes
SHA-256: 53ce975f39a01eb6f1ad9bcca8b58540d1457b4cda81cff4929ccd08e6685a5c
font_01_sfnt_off0000c9ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC9AC 14172 bytes
SHA-256: 2a695636ecf80a2191f30b432d11640d7b47be655a11f098284e1eceee10edb7
font_02_sfnt_off0000ecba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECBA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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