Malicious PDF — malware analysis report

Static analysis result for SHA-256 df2b14ecbf678c53…

MALICIOUS

PDF

82.3 KB Created: 2021-07-24 08:09:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: dea7562e4d75f83ba981202cd6244e78 SHA-1: 2fbbba9e83ddd17cf1a56b544cef46b7fdd3f377 SHA-256: df2b14ecbf678c53fecb1b33fb35c58cd5aed86aa23becd1b0a37396dcb43aa4
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It functions as a link farm, directing users to multiple external websites, some of which are hosted on compromised CMS uploads or disposable domains. The presence of numerous unknown URLs suggests a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

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 http://canyonoaksmtg.com/~duckdi5/canyonoaksmtg.com/content/file/zafoxojef.pdf In PDF document text
    • https://www.djluk.co.uk/wp-content/plugins/super-forms/uploads/php/files/ep91pg3unsq9v0bko10s3hn1ch/75652480172.pdfIn PDF document text
    • http://www.odnpoznan.pl/fotki/file/file/gadefadeseforelivedeti.pdfIn PDF document text
    • http://xn----8sbpvg0afdbe.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/aaf6t5s36lr28aboa97q5e4bb2/tigot.pdfIn PDF document text
    • https://dursunguney.com/userfiles/files/87048375216.pdfIn PDF document text
    • http://daugiavanthienphuoc.com/media/ftp/file/koseruma.pdfIn PDF document text
    • https://www.karavanlakesfet.com/wp-content/plugins/super-forms/uploads/php/files/dceb40339d1923092f4f5467d0f387c4/kodiwid.pdfIn PDF document text
    • http://pensjonatagat.pl/userfiles/file/rovosipasavodaxevasador.pdfIn PDF document text
    • https://mattweidnerlaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f5638b16877---pufesosibifot.pdfIn PDF document text
    • http://naturabliskociebie.pl/userfiles/file/70189556557.pdfIn PDF document text
    • https://belgradenightlife.info/wp-content/plugins/super-forms/uploads/php/files/avr734e6hsm6fu5rij8bj24fbs/jobemuzibevewogetovalegom.pdfIn PDF document text
    • http://perfectionistpaintingnj.com/ckfinder/userfiles/files/pejiwerumuk.pdfIn PDF document text
    • http://holycrossyouthministryasp.org/clients/f/fa/fa15eac34f6f8ef5a8ada011ffef1578/File/67534064712.pdfIn PDF document text
    • http://minhledtran.com/luutru/files/madadegim.pdfIn PDF document text
    • http://zxpgw.com/userfiles/file/padexumejikumomimarevofi.pdfIn PDF document text
    • https://motionslam.com/wp-content/plugins/super-forms/uploads/php/files/20fc338313adb830db43b4672e50ed93/kagubatigivemedojokuzod.pdfIn PDF document text
    • http://famcareconnect.org/wp-content/plugins/formcraft/file-upload/server/content/files/1606c81ed5a0de---78846752041.pdfIn PDF document text
    • https://www.prestigeautobody.com.au/wp-content/plugins/super-forms/uploads/php/files/0e120b3e63b9a495dd5150243f44ee18/zilamuwaxunopizopeba.pdfIn PDF document text
    • http://precedent.by/_newsite/images_from_html_editor/file/niwewefuralovijates.pdfIn PDF document text
    • http://linhkienhunganh.vn/luutru/files/gizuvadifej.pdfIn PDF document text
    • http://donaldnathanlaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/52958221451.pdfIn PDF document text
    • http://bwc.lt/i/81297113641.pdfIn PDF document text
    • http://fapannimario.it/userfiles/files/1169218429.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/DOqCt-cVA4I/uplcv?utm_term=how+to+recover+whatsapp+deleted+chat+historyPDF 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_off0000dfde.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFDE 10764 bytes
SHA-256: 91f3ea5140a7d43c9c12713e2332a404a197168d871b3c6007b0b40f00a6ae5f
font_01_sfnt_off0000f8cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8CD 16512 bytes
SHA-256: 30cad95d134c33c36b37e931275e38882d375911921e71a5d68373048ed3a737
font_02_sfnt_off000123bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x123BC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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