Malicious PDF — malware analysis report

Static analysis result for SHA-256 3492eba705412f20…

MALICIOUS

PDF

87.8 KB Created: 2021-08-21 00:05:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-18
MD5: 42d3983bf9e848ecdce3c7bd2de82f16 SHA-1: d04deac7455bb2431bbd592ca24f7403ea7661d6 SHA-256: 3492eba705412f20d0109ea3f60b729f0f3cd44e266036e26910e0ac777b1217
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm with numerous URLs hosted on compromised websites, suggesting an attempt to direct users to malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded URLs point towards a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9972

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://sibinetweek.ru/userfiles/file/2321722138.pdf In PDF document text
    • https://dtcprojects.com.au/wp-content/plugins/super-forms/uploads/php/files/tj5a4v5rue25km48meurb2vc1p/kariri.pdfIn PDF document text
    • http://astorandblack.net/emailer/userfiles/file/noxofanedaveki.pdfIn PDF document text
    • http://www.rolstoellift.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075663ab7bfc---bamejunutegalupemevawoxe.pdfIn PDF document text
    • http://familiegravesen.dk/userfiles/file/62658384057.pdfIn PDF document text
    • http://lpkgoodframeupvc.com/userfiles/files/legeviki.pdfIn PDF document text
    • http://nc2e.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160a23fd4b5516---38406602315.pdfIn PDF document text
    • http://bajcsidavidfoto.com/_user/file/80797798828.pdfIn PDF document text
    • https://goez3.com/10005001208290177/ckfinder/userfiles/files/besopobunorokuruxatu.pdfIn PDF document text
    • http://markasib.ru/ckfinder/userfiles/files/vukosew.pdfIn PDF document text
    • http://www.johnknox.ch/wp-content/plugins/formcraft/file-upload/server/content/files/1609d09c05028d---xumezivabozo.pdfIn PDF document text
    • http://instalater-macecek.cz/klienti/devel/sneznerolby.cz/ckfinder/userfiles/files/65028134201.pdfIn PDF document text
    • http://luisacortesearchitetto.it/userfiles/files/90050818793.pdfIn PDF document text
    • http://taitung-house.com/CKEdit/upload/files/125815005.pdfIn PDF document text
    • http://starlightcelebrates.org/clients/4/43/43e9139217482d7666ce300faf566241/File/57220792480.pdfIn PDF document text
    • https://amartzon.store/wp-content/plugins/super-forms/uploads/php/files/37153c539edd902a5a7df5b6b772e1ac/79577796710.pdfIn PDF document text
    • https://datawire.gr/files/files/jolupegetetoritebitiri.pdfIn PDF document text
    • https://sheenabusesandcoaches.com/userfiles/file/garitepipuvapit.pdfIn PDF document text
    • https://carea2plus.com/wp-content/plugins/super-forms/uploads/php/files/6d631dab6d30744cab29bd610a6655b0/7389570162.pdfIn PDF document text
    • https://amesmedicalservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609aafa58b174---wewadibega.pdfIn PDF document text
    • https://xo-sound.ru/userfiles/file/47423112891.pdfIn PDF document text
    • http://onyx-innovations.com/assets/ckfinder/userfiles/files/40808717520.pdfIn PDF document text
    • http://southportrubbish.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608b74ca9d7a6---walatiwomod.pdfIn PDF document text
    • https://www.democratum.com/wp-content/plugins/super-forms/uploads/php/files/fd5024e66858bf6db079441c2e9ab62c/21947627754.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1xuhb7AK25c/uplcv?utm_term=norton+ghost+11.5+1+free+downloadPDF 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_off0000f0cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0CB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000108e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x108E2 10856 bytes
SHA-256: 1c10487bb651a0634f660fd847c72a6c2eecca7ac60c43bf61cfa7a12b8e8873
font_02_sfnt_off000121e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x121E2 18112 bytes
SHA-256: e563416571641b5dc111b60b3beeb4dbe2f0c6b2e869a1b1119d37a36146cacb

Open this report in the interactive analyzer, or submit your own file for analysis.