Malicious PDF — malware analysis report

Static analysis result for SHA-256 59fa6278b82d11cc…

MALICIOUS

PDF

123.2 KB Created: 2021-09-07 07:20:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-04
MD5: a7c96fd380dbff8b1a1352e0cf90ada5 SHA-1: e691415c78c3467f14d019fdff29dd13045bfbb0 SHA-256: 59fa6278b82d11cc8eacb8620c6f5752408d2e93331f49969bfccc2e6f24c0a9
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 User Execution: Malicious File

The file is identified as malicious by ClamAV and an ML classifier, exhibiting characteristics of a phishing or trojan delivery mechanism. It contains numerous external URIs, many pointing to compromised or disposable hosting, suggesting an attempt to host malicious content or redirect users. The 'SE_ENABLE_LURE' heuristic indicates the document likely prompts the user to enable macros or editing, a common tactic for malware droppers.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9961

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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.
  • Macro/content-enable lure medium SE_ENABLE_LURE
    Document instructs the user to enable macros or editing — a common technique used by malware droppers to bypass Office macro security settings
  • 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://inwebjor.ru/uplcv?utm_term=water+treatment+plant+layout+pdf PDF link annotation
    • https://www.napariverinn.com/wp-content/plugins/super-forms/uploads/php/files/6bad02e3c59dfa320dfbace1e37dc9f7/jerivaf.pdfIn PDF document text
    • https://betenagro.com/sites/default/files/file/16366350975.pdfIn PDF document text
    • https://loyallcanada.ca/editor_files/file/faretasutuxigad.pdfIn PDF document text
    • https://mzlpro.com/web/img/podborky/files/1770589168.pdfIn PDF document text
    • http://mountmedpharmacy.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160b148f4266df---fukenulonegetalo.pdfIn PDF document text
    • http://www.egavilanes.com/ckfinder/userfiles/files/67092012582.pdfIn PDF document text
    • http://dodogs.ru/sites/default/files/file/sotobokebuzelebexute.pdfIn PDF document text
    • http://www.sempresaude.net/wp-content/plugins/formcraft/file-upload/server/content/files/160bb479bbb279---fewutexoj.pdfIn PDF document text
    • http://meble-tk.pl/userfiles/file/vuxezolawuvase.pdfIn PDF document text
    • https://computerzone.pk/file/84808271206.pdfIn PDF document text
    • http://whkmradio.com/userfiles/file/30527874077.pdfIn PDF document text
    • https://sdyh.gr/wp-content/plugins/super-forms/uploads/php/files/7s1bhjn9n3sc5lbisssk4gplp7/xijub.pdfIn PDF document text
    • https://voicelux.ru/wp-content/plugins/super-forms/uploads/php/files/18a7619da4c2331262d8bd08135e57fd/12706763172.pdfIn PDF document text
    • https://www.arc-welding.co.uk/wp-content/plugins/super-forms/uploads/php/files/vp2q2r59eimnj4i7v8fufbf1sv/molidunana.pdfIn PDF document text
    • https://bahamianbrewery.com/ckfinder/userfiles/files/nigim.pdfIn PDF document text
    • https://www.sacda.org/wp-content/plugins/super-forms/uploads/php/files/cf3hlhh30dm16n53jr5h0nbd33/vuvebiwidesar.pdfIn PDF document text
    • http://nagyberki.hu/sites/default/files/fck_uploads/file/55793297901.pdfIn PDF document text
    • https://leo-translate.com.ua/wp-content/plugins/formcraft/file-upload/server/content/files/1608763a421891---18461133318.pdfIn PDF document text
    • http://www.eurosecurimed.com/ckfinder/userfiles/files/44252184361.pdfIn PDF document text
    • https://mzlpro.com/web/img/podborky/files/sumozopasupazagojutesatu.pdfIn PDF document text
    • http://yenidenyuzlendirme.com/ckfinder/userfiles/files/jolowuvovixenuxetidituk.pdfIn PDF document text
    • http://157.230.241.115/image/upload/File/70972485322.pdfPDF link annotation
    • https://backcountryplayground.com/wp-content/plugins/super-forms/uploads/php/files/6dfa901ab22721f5f4c6bf92048ecfe2/wumejamokiw.pdfIn PDF document text
    • 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_off00017afe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17AFE 10608 bytes
SHA-256: 34e7a417d2fe32ab52cd111a480bb2fec3c5597ef696f04dd7f3c92d825e70f4
font_01_sfnt_off00019337.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19337 19852 bytes
SHA-256: 1ac9a526a5a7db6b84a0f297527edc7e352f321937e748f4f8e6e45ad9d9c0c8
font_02_sfnt_off0001c6d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1C6D2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1