Malicious PDF — malware analysis report

Static analysis result for SHA-256 2ceb2c015b7cf41b…

MALICIOUS

PDF

72.7 KB Created: 2021-09-19 21:27:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: fb1631d6dcb9a5c3342a415aa9a95c6d SHA-1: dbb9ba5af5b9609b3e31a2e856a3bc965358b26d SHA-256: 2ceb2c015b7cf41b9435240a7860bf4ff2abf2e841cdcce92af06666adf7d68e
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external websites, many of which are hosted on compromised WordPress installations or disposable domains, suggesting a phishing or malware distribution attempt. The 'utm_term' parameter in one URL indicates a lure related to downloading MP3 songs, a common tactic for social engineering. The ML classifier and ClamAV detection strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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://catamma.ru/uplcv?utm_term=download+malayalam+mp3+songs+320kbps PDF link annotation
    • https://shotclock.ca/wp-content/plugins/super-forms/uploads/php/files/6a66c0babff9a986fcb1e1ddc34ae429/jesanoritirimaruwavew.pdfIn PDF document text
    • https://inchiriereelicoptere.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16137308f7ad4a---wavagizaxuji.pdfIn PDF document text
    • https://petala.gr/userfiles/file/wuleruto.pdfIn PDF document text
    • https://www.andeanskyline.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613ac79425276---gowise.pdfIn PDF document text
    • http://irvinenott.co.uk/ckfinder/userfiles/files/20533851477.pdfIn PDF document text
    • http://mfplus.ba/wp-content/plugins/formcraft/file-upload/server/content/files/1613ecf42e6c56---zefepatejeluzajelunevere.pdfIn PDF document text
    • https://przyklejki.pl/userfiles/65404866033.pdfIn PDF document text
    • http://xn--80aer5aza.xn----htbdepbihnfb8cyg.xn--p1ai/ckfinder/userfiles/files/73055327210.pdfIn PDF document text
    • http://sokole-tps.pl/userfiles/file/702252476.pdfIn PDF document text
    • https://centrorevisionimonregalese.it/file/71487417424.pdfIn PDF document text
    • http://koopmankennedyfeller.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/96504580852.pdfIn PDF document text
    • https://lordoptika.hu/files/files/91726625104.pdfIn PDF document text
    • http://studiozoppini.com/userfiles/files/vodutibafonakodixonemu.pdfIn PDF document text
    • http://tonwen.org/userfiles/file/13807849178.pdfIn PDF document text
    • https://cnn-logistics.com/asset/files/vuwerigoxogodasaz.pdfIn PDF document text
    • https://prana.video/wp-content/plugins/super-forms/uploads/php/files/o2m1djrnhm0k808kcoa14f7uab/55568066472.pdfIn PDF document text
    • http://ecme.site/2015/vat/upload/files/pegeraguvininewagevibam.pdfIn PDF document text
    • https://lifesmart.lifesmart.ro/ckfinder/userfiles/files/14463447340.pdfIn PDF document text
    • http://brukbet.com/user_images/file/zikufos.pdfIn PDF document text
    • https://fisheaglesafaris.net/pics/user/file/26408470676.pdfIn PDF document text
    • http://skontrolsengineering.com/file_media/file_image/file/sebeneresafovuxuvigite.pdfIn PDF document text
    • http://vaynhe.com/upload/files/60594975961.pdfIn PDF document text
    • https://ww150007.linebot.net/upfile/files/20210919001449.pdfIn PDF document text
    • http://akcompany.vn/uploads/userfiles/file/93560163679.pdfIn PDF document text
    • https://sim2007.com/files/kigel.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_off0000baa3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBAA3 11160 bytes
SHA-256: 456106c532d8bbdf6ba4c87d5b6e974faf1900b834866080fbcd209b5574574c
font_01_sfnt_off0000d45f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD45F 15696 bytes
SHA-256: 441be7598abaee5269dbc83be15ebd21829f36febaa5c8a3d3ad37a1d7afa8a3
font_02_sfnt_off0000fc88.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC88 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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