Malicious PDF — malware analysis report

Static analysis result for SHA-256 2f6eafd8b9c08bf7…

MALICIOUS

PDF

83.3 KB Created: 2021-10-06 17:20:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: a0b8845552a8830cf878b92059d52042 SHA-1: 39cb1539f87103192bef369d77daa6c81eeed73f SHA-256: 2f6eafd8b9c08bf78c50ad4fabf3b2d1710478b562888c39659187bb8d201d5b
156 Risk Score

Malware Insights

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

The PDF was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains numerous links, many pointing to disposable hosting or compromised CMS uploads, forming a link farm. These links likely lead to phishing sites or further malware downloads, indicating a malicious intent to deceive users.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

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://petroblend.com/wp-content/plugins/formcraft/file-upload/server/content/files/161569702292ff---fezuxitakude.pdf In PDF document text
    • http://benthanhsgfarm.net/images/uploads/files/73794644355.pdfIn PDF document text
    • http://fxlcd.com/upload/file/bagapunox.pdfIn PDF document text
    • https://inprovit.com/ckfinder/userfiles/files/fofekapavutafufixigok.pdfIn PDF document text
    • https://alcoquimicos.com/ckfinder/userfiles/files/kepizawidev.pdfIn PDF document text
    • https://benmoonpharma.com/userfiles/file/80747342469.pdfIn PDF document text
    • http://niestachow.pl/data/aktualnosci_imgs/file/zujeti.pdfIn PDF document text
    • http://dancephoto.ru/userfiles/files/67300479952.pdfIn PDF document text
    • http://szamosiszerviz.hu/feltoltott/files/26721695357.pdfIn PDF document text
    • https://aarushimukhwas.idealviews.com/userfiles/files/84183804552.pdfIn PDF document text
    • http://mineraux-et-lithotherapie.fr/ckeditor/upload/files/gulutiseju.pdfIn PDF document text
    • https://davaocarrental.com/images/file/gileluvinititoriguwomedi.pdfIn PDF document text
    • https://kemxoithanhhang.vn/app/webroot/files/images/pages/files/99741236246.pdfIn PDF document text
    • http://investin-khj.ir/ckfinder/userfiles/files/zosununobeb.pdfIn PDF document text
    • https://rhuyscampingcar.fr/images/files/11962344624.pdfIn PDF document text
    • http://vilocom.net/webroot/img/files/66539079383.pdfIn PDF document text
    • http://sinching.com/uploadpic/files/202109110446188478.pdfIn PDF document text
    • http://emeat.ru/var/files/73060414997.pdfIn PDF document text
    • http://www.sunarpazarlama.com/wp-content/plugins/super-forms/uploads/php/files/tj20hnllkbve928u38dgeidvv4/14002740842.pdfIn PDF document text
    • https://nhaban24h.com.vn/wp-content/plugins/super-forms/uploads/php/files/kcnvqhosj28tgspk5d89m21jv7/65701382484.pdfIn PDF document text
    • http://gabinetpro.gabinetpro.pl/kosmetyczka/krakow/files/buvilibabukoweweviragobor.pdfIn PDF document text
    • https://0908108108.tw/upfile/files/2021/09/29/80136993821.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/S30rS-6n6vg/uplcv?utm_term=movie+magic+budgeting+examplesPDF 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_off0000dcd3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCD3 11160 bytes
SHA-256: ca04a92f7b740c7e328af3ca3213ea80ed29b9c26fe9b5a30db9f2949bfe72c3
font_01_sfnt_off0000f689.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF689 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010e9b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E9B 18556 bytes
SHA-256: c7985210347d18e748813c781f62622b63ed54ee7598af28d3403941de0a84ad