Malicious PDF — malware analysis report

Static analysis result for SHA-256 cd265b4324c8f1d9…

MALICIOUS

PDF

69.4 KB Created: 2021-10-09 19:44:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: 6784b01ddaa04cdb6ca1d565b1c41793 SHA-1: d22d79fa12a4e8ee3e438d632258c5ef46222a03 SHA-256: cd265b4324c8f1d9cb41211414d8a8b4792d7d88e1ca692321d09533fc259470
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.001 User Execution: Malicious Link

The PDF document exhibits characteristics of a phishing lure, utilizing an image-based design with clickable links to external websites. Heuristics indicate it's a link farm hosted on compromised CMS uploads, suggesting an attempt to redirect users to malicious content. While no scripts were directly extracted, the PDF structure and link farm behavior strongly suggest an intent to exploit user interaction via embedded links, likely leading to further compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9978

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 0 text block(s), carries a click-outward action, and is only 69 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://miamiuniquelimo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1615a27bab160f---pawudurerotasib.pdf In PDF document text
    • https://phase1acoustics.com/wp-content/plugins/formcraft/file-upload/server/content/files/1615923de5e7ff---48296970444.pdfIn PDF document text
    • http://xhzhengli.com/upload/12442567534.pdfIn PDF document text
    • http://abwingsva.com/uploads/files/jewisebapa.pdfIn PDF document text
    • http://stihoplet.by/upload/editor/files/44980782742.pdfIn PDF document text
    • http://lalitas-thaimassage-spa.de/wp-content/plugins/formcraft/file-upload/server/content/files/1615dc826cc627---dopoxerafi.pdfIn PDF document text
    • https://diamond-marketing.cz/soubory/bopaxogo.pdfIn PDF document text
    • https://samsungdvmklima.com/upload/ckfinder/files/12481891681.pdfIn PDF document text
    • https://www.formwork.co.uk/wp-content/plugins/super-forms/uploads/php/files/td1ef35tdj2a7jieqitat97065/2414299609.pdfIn PDF document text
    • http://adwokaci-pila.pl/userfiles/file/zawidosubojivexobabez.pdfIn PDF document text
    • http://tarnava.eu/user_images/file/11446316838.pdfIn PDF document text
    • http://nceed.kr/pds/userfiles/files/punumexelezadegimebisovo.pdfIn PDF document text
    • https://popa.com.br/wp-content/plugins/super-forms/uploads/php/files/049c377492de553e07f0960927a10626/60778159868.pdfIn PDF document text
    • http://ty-int.com/files/files/20498221163.pdfIn PDF document text
    • https://mebelpozakazu.ru/wp-content/plugins/super-forms/uploads/php/files/279fdde82ec15011f8cc5331318f96ca/93808611885.pdfIn PDF document text
    • http://gardenofsound.com/userfiles/files/godisonelonepunu.pdfIn PDF document text
    • http://konditsionery-reutov.ru/upload_picture/file/wutigif.pdfIn PDF document text
    • http://hwangtosidae.com/userData/ebizro_board/file/10754252590.pdfIn PDF document text
    • https://spazmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/16160edf1459a1---31621115799.pdfIn PDF document text
    • https://stepweystudy.com/ckfinder/userfiles/files/tajipafikita.pdfIn PDF document text
    • https://svenjakretschmer.com/ckfinder/userfiles/files/57376889861.pdfIn PDF document text
    • http://cherriestattoo.com/ckfinder/userfiles/files/fegijoz.pdfIn PDF document text
    • http://jurabos.nl/include/editor/file/dumajotunifuxefugapini.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1xuhb7AK25c/uplcv?utm_term=types+of+curriculum+objectivesPDF 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_off0000b38c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB38C 10888 bytes
SHA-256: 8572e356227e381bd7e5d6c9ef1fa0494ed102c65c04561345849f802d809993
font_01_sfnt_off0000cc92.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC92 14188 bytes
SHA-256: cef25ccb0ea13cf5866cf60668f3e1b68806abcef4ef9014d5cecb2911b3df6a
font_02_sfnt_off0000ef7a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF7A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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