Malicious PDF — malware analysis report

Static analysis result for SHA-256 0fed3f9cf0df1517…

MALICIOUS

PDF

96.3 KB Created: 2021-08-07 07:54:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 7354ff3d3b30d5dc525592a6f628a3b2 SHA-1: 6f5e00e07df295984876931ee550be60f49898a6 SHA-256: 0fed3f9cf0df1517a3caad25e54b10647ae2b63ef9f717bf72689f3a92c5c589
156 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. Heuristics identified it as a link farm pointing to compromised WordPress sites, suggesting a phishing or malware distribution campaign. The embedded URLs are likely part of this campaign, aiming to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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://paymentsbusiness.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160abca946a6cb---juzamelizetozesajuwokirid.pdf In PDF document text
    • http://www.sunarmisir.com.tr/wp-content/plugins/super-forms/uploads/php/files/vspsltf1ou12ksvgbb9upjfa90/8129366223.pdfIn PDF document text
    • http://adhdadvisory.com/wp-content/plugins/formcraft/file-upload/server/content/files/160fe7f67a6edb---selowiwiregadodogidap.pdfIn PDF document text
    • https://asiaviews.org/wp-content/plugins/super-forms/uploads/php/files/f4nts2tbipdv6g3do7tu705fo4/93172268503.pdfIn PDF document text
    • https://desertflying.club/wp-content/plugins/formcraft/file-upload/server/content/files/160bba0a5943de---55898790265.pdfIn PDF document text
    • https://awlights.com/wp-content/plugins/super-forms/uploads/php/files/e9c91b7896bcd290325e87356c9c9bf4/jomakol.pdfIn PDF document text
    • http://www.siscard.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a268da101e6---62425608386.pdfIn PDF document text
    • http://www.esthemed.ch/wp-content/plugins/formcraft/file-upload/server/content/files/160887c2d91a4b---55183827931.pdfIn PDF document text
    • https://lesura.net/userfiles/file/nanifisoxinivekem.pdfIn PDF document text
    • http://www.iqubz.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606db25057584---61189544562.pdfIn PDF document text
    • http://nickels.design/ckfinder/userfiles/files/lalikovejirimowekekajam.pdfIn PDF document text
    • http://www.lugashotel.com/data/editorfile/71379486548.pdfIn PDF document text
    • https://irepairplus.nl/app/webroot/files/userfiles/files/mabuliwu.pdfIn PDF document text
    • http://bochosushi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d8c99e06ba---96790580676.pdfIn PDF document text
    • https://www.wikiwebagency.it/wp-content/plugins/super-forms/uploads/php/files/aa9f5659253b6e1d016edbc7eed17323/nifop.pdfIn PDF document text
    • http://join-angel.com/ckfinder/userfiles/files/47639874638.pdfIn PDF document text
    • http://accessiblevehicleservices.com/userfiles/file/vewudigebuxulo.pdfIn PDF document text
    • https://amitadevnani.com/userfiles/file/giginekesuberubokofifame.pdfIn PDF document text
    • https://kalitelivideoizle.com/resimler/files/rubifilukulamefaga.pdfIn PDF document text
    • https://ebooksweb.net/files/file/23138920939.pdfIn PDF document text
    • http://flooroverstock.com/admin/userfiles/file/vimigitawemoj.pdfIn PDF document text
    • https://www.getfitcrew.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a7fc90dfba6---41018226371.pdfIn PDF document text
    • http://www.heksan.com.pl/file/dasoxakameke.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1xuhb7AK25c/uplcv?utm_term=exercice+phrase+simple+et+complexe+%C3%A0+imprimer+6%C3%A8mePDF 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_off000108df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x108DF 11128 bytes
SHA-256: a62b997f777333970fd3f0c6ea638bd8526ec5c7d461db574fadac118f7f93b7
font_01_sfnt_off0001222a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1222A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00013a3c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13A3C 21236 bytes
SHA-256: 57bc1d1fbca906bb4c0e2ad8e76422dc3b48dc93cae6c929e94d7d1419a1217c

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