Malicious PDF — malware analysis report

Static analysis result for SHA-256 ebf14bfd85ae191d…

MALICIOUS

PDF

81.4 KB Created: 2021-08-24 11:24:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: a5914f9d537fa85d642f382dece33a76 SHA-1: 4786214203d382bacb69033ead986bd5c398f37b SHA-256: ebf14bfd85ae191d830e184b497a3768ed80457433c99ff2698207a8731cec21
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document was flagged by ClamAV as a phishing trojan and by an ML classifier as malicious. It contains numerous links, many pointing to compromised WordPress upload directories, suggesting a link farm designed to redirect users. While no scripts were explicitly extracted, the nature of the links and the detection suggest a phishing or malware distribution attempt, likely delivered as a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

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://www.asahinafunnels.com/wp-content/plugins/super-forms/uploads/php/files/f1p83djjv07m603n8tapvvojrh/zetiwidoxuno.pdf In PDF document text
    • http://cck-brno.cz/ckfinder/userfiles/files/sapidarolujagusonusimero.pdfIn PDF document text
    • http://euro-ex.com/images/blog//file/nezine.pdfIn PDF document text
    • https://arizonalightingsales.com/wp-content/plugins/super-forms/uploads/php/files/dc880a64515fbf918c8ec88abca8e491/70624288436.pdfIn PDF document text
    • https://wamsconference.com/wp-content/plugins/super-forms/uploads/php/files/2267b71bdf685442fa0c5acea6930a65/88790859384.pdfIn PDF document text
    • https://textmakareknutsson.se/upload/image/3551653335.pdfIn PDF document text
    • http://onfireinteriors.com/userfiles/97753504639.pdfIn PDF document text
    • http://homestationrealty.com/userfiles/files/31461049136.pdfIn PDF document text
    • http://shimamura-mail-order.com/userfiles/file/27775679931.pdfIn PDF document text
    • http://jnejendomsdrift.dk/userfiles/file/jaxeminel.pdfIn PDF document text
    • https://cananalimdar.com/wp-content/plugins/super-forms/uploads/php/files/2ip5p0s9bo27lothm0n0hh2gks/95954989961.pdfIn PDF document text
    • http://sdtrafficticketlawyer.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/xaxujam.pdfIn PDF document text
    • http://charugarware.com/DEVELOPMENT/charu_garware/uploaded/userfiles/file/88350619918.pdfIn PDF document text
    • http://hosteleriayvending.com//ckfinder/userfiles/files/biravosekulaj.pdfIn PDF document text
    • http://okmarin.ru/userfiles/file/fefanoxazebuwekifo.pdfIn PDF document text
    • http://moon-villa123.com/CKEdit/upload/files/jezutatafosapijavaziwube.pdfIn PDF document text
    • http://inwallendorf.de/userfiles/file/mewudajobanokixofez.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a4e3ac5363b---rewenosotem.pdfIn PDF document text
    • https://mk-sito.it/uploads/file/94327620596.pdfIn PDF document text
    • http://ptk-astana.kz/wp-content/plugins/super-forms/uploads/php/files/bc222c3c795c4052ca16b7affb528f29/pabelozuva.pdfIn PDF document text
    • https://gfow.om/wp-content/plugins/super-forms/uploads/php/files/jhojnsbk8989mcqu32rq2mnug5/52808709237.pdfIn PDF document text
    • https://414movement.com/wp-content/plugins/super-forms/uploads/php/files/8118e59153beac0a56a2a6a630b9cd70/10670952115.pdfIn PDF document text
    • http://skupka54.ru/upload/m/69322878563.pdfIn PDF document text
    • http://irmascaritasdejesus.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/160c8639407a92---rukipuje.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/DOqCt-cVA4I/uplcv?utm_term=lift+master+owners+manualPDF 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_off0000db6c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB6C 16636 bytes
SHA-256: 835739e9a9759f5bc824f0ff61188e7e5a09b6e28dafb58957b2d81fef928650
font_01_sfnt_off0001068e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1068E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011ea5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11EA5 10520 bytes
SHA-256: cc7a9e943f3866bd8e3b3be58534f1dd7298bf574e03cb4411a178cec9d83c98