Malicious PDF — malware analysis report

Static analysis result for SHA-256 1f5ac79f6e9d123e…

MALICIOUS

PDF

82.1 KB Created: 2021-09-05 01:29:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 3aad9c4cc2ec83ec95c2d4a27d71b880 SHA-1: 6f347c7daefe5978dad87a38adb11fe6ed2e47f5 SHA-256: 1f5ac79f6e9d123e5c14dad248db262de9d95469536fbecd6a1dc007150ce02d
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded links, many of which point to compromised websites or disposable hosting, suggesting a link farm designed to redirect users to malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were directly extracted, the PDF structure and embedded URLs are indicative of a phishing or redirection attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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
  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://dbjhockeytournament.com/clients/f/f9/f9ff496842c877cbb4522510b668f2a2/File/wifonuwezuvozuzebelugen.pdf In PDF document text
    • http://kemmurad.com/webroot/img/files/jonizikodiwelegupuwufetuk.pdfIn PDF document text
    • http://www.marsagri.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c207d716b18---50091755400.pdfIn PDF document text
    • https://newat.ru/wp-content/plugins/super-forms/uploads/php/files/01be30872adf7c905c1095d3d0e59bb3/pajiweziwisepumiwumuw.pdfIn PDF document text
    • http://canionglobal.com/FCKeditor/file/11473094093.pdfIn PDF document text
    • http://driver-jazda.pl/upload/file/pemajetesukurun.pdfIn PDF document text
    • https://www.soroptimist.be/oldsite/intranet/ckeditor/ckfinder/userfiles/images//files/34491396339.pdfIn PDF document text
    • https://asset-books.com/userfiles/file/52914495402.pdfIn PDF document text
    • https://fitness-sport.it/userfiles/file/jubejuzodarel.pdfIn PDF document text
    • http://ventilyatsia-v-sochi.ru/ckfinder/userfiles/files/xaxutiruwuviwenumalobipar.pdfIn PDF document text
    • https://www.sevgiliyevideo.net/wp-content/plugins/formcraft/file-upload/server/content/files/161208b64bfd55---vorepitekixobonutodex.pdfIn PDF document text
    • http://dancedynamicsla.com/clients/38740/File/80032518896.pdfIn PDF document text
    • http://www.impactit.in/ckfinder/userfiles/files/3597502824.pdfIn PDF document text
    • http://gloria-eurex.com/images/blog/file/pilefodatusabe.pdfIn PDF document text
    • http://csc0851.com/userfiles/file/20210717024136_3d74bz.pdfIn PDF document text
    • http://fashioncenterpoint.com/wp-content/plugins/super-forms/uploads/php/files/788a662b47d1d2205adb9e1c1515b24c/92174601114.pdfIn PDF document text
    • https://mszukam.pl/dat//file/11173402626.pdfIn PDF document text
    • http://www.colormotion.cz/UserFiles/file/95248788133.pdfIn PDF document text
    • https://ntwbearing.com/UserFiles/File/54971424576.pdfIn PDF document text
    • https://indacphuc.com/wp-content/plugins/super-forms/uploads/php/files/j78ebnfrvsvhvaq7nv2bf3a99b/xirafemorigotomu.pdfIn PDF document text
    • http://jar-ted.pl/file/50630911920.pdfIn PDF document text
    • https://westcoastmovers.ca/wp-content/plugins/super-forms/uploads/php/files/36i54e1e4igfjvl181dt1f2t4r/97746160121.pdfIn PDF document text
    • http://lacyfamilyunity.com/clients/2/20/203fd950dafdada58ea32e7b96f0d147/File/44954611398.pdfIn PDF document text
    • http://sam-global.info/files/file/minibadavepezejizabulew.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/cv9VXjIrmdE/uplcv?utm_term=acca+f3+bpp+kit+pdfPDF 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000df11.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF11 17096 bytes
SHA-256: a42524a38a28f49b89ae6ffd4dab0072063b7d969dd81683d21e7a2991ce3990
font_01_sfnt_off00010b71.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B71 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012388.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12388 10328 bytes
SHA-256: bdfca2c306bd4a27de26d5ac5ba06b79e610897ac326ad72c5f230fbbf317558

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