Malicious PDF — malware analysis report

Static analysis result for SHA-256 7fcfd6e8893a78b6…

MALICIOUS

PDF

74.3 KB Created: 2021-07-03 21:36:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: dfe6daeb876c0f554cf37b6ecb4055a2 SHA-1: b1a25370a73ed5e0980602d0fea49f37e8316325 SHA-256: 7fcfd6e8893a78b65f715dae369775bf6cc15b5b288c4c69163f3abb870394ce
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was detected as malicious by ClamAV and a machine learning classifier. It contains numerous links pointing to compromised websites and IP addresses, suggesting it's part of a phishing or malware distribution campaign. The presence of embedded URLs and the nature of the heuristic firings indicate an attempt to redirect the user to malicious content, likely exploiting the 'Spearphishing Attachment' technique.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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://www.kinoimaging.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16072d66d28261---najeroxovusav.pdf In PDF document text
    • http://www.uppld.org/wp-content/plugins/formcraft/file-upload/server/content/files/160c9974699121---83915669145.pdfIn PDF document text
    • http://sad-azov.ru/wp-content/plugins/super-forms/uploads/php/files/f2aa65e7d827bef00906f124762013c5/6615300363.pdfIn PDF document text
    • https://intelean.com/wp-content/plugins/formcraft/file-upload/server/content/files/16079217a37f6f---33056122617.pdfIn PDF document text
    • http://apartmaji-zunicmile.com/uporabnik/file/73985193525.pdfIn PDF document text
    • http://157.230.241.115/image/upload/File/togezanoxegul.pdfPDF link annotation
    • http://4seasonstours.in/userfiles/file/zodafujoruj.pdfIn PDF document text
    • https://orldoc.ch/wp-content/plugins/super-forms/uploads/php/files/0jvbv1s5cvc44cvfocfri78nc0/28952559090.pdfIn PDF document text
    • http://www.majorisinvestimentos.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607a44f42d479---98003887586.pdfIn PDF document text
    • https://gift-edu.ru/wp-content/plugins/super-forms/uploads/php/files/db38df576b0e66a69ab0c7bb88349ec4/62956861178.pdfIn PDF document text
    • http://aahsclassof1978.com/clients/b/b6/b6117739535924054831d33ecd54b00a/File/gevumaxujaxeludul.pdfIn PDF document text
    • http://pocatellocampfire.com/wp-content/plugins/super-forms/uploads/php/files/icjock0u6hsot4t4lne31icvbf/67236968130.pdfIn PDF document text
    • http://aprendanow.com/wp-content/plugins/super-forms/uploads/php/files/62109f3570494bac4091dfdf8d68850b/putafosebifixepakigafifof.pdfIn PDF document text
    • http://www.liveartsaskatchewan.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608ef8dc2ec75---fiwujitalotanizalopufas.pdfIn PDF document text
    • https://www.cukoyem.com.tr/wp-content/plugins/super-forms/uploads/php/files/et6mb1o5qpm09ond1n5npfmav3/goxusomeramar.pdfIn PDF document text
    • https://contabil-fiscal.ro/mm/file/zudur.pdfIn PDF document text
    • https://baxsporthorses.nl/userfiles/file/91889492526.pdfIn PDF document text
    • http://www.risingstars.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160a9e7758d45c---xumuvoro.pdfIn PDF document text
    • http://mfplus.ba/wp-content/plugins/formcraft/file-upload/server/content/files/160881fec57393---tamelibigugowizexamunuza.pdfIn PDF document text
    • https://qualitylightsolutions.com/wp-content/plugins/super-forms/uploads/php/files/5cedf1051aa6a20e949d051a146e0245/34601669263.pdfIn PDF document text
    • https://www.jscorporation.co.in/wp-content/plugins/formcraft/file-upload/server/content/files/16082987f6cd62---vikirafo.pdfIn PDF document text
    • https://www.asahinafunnels.com/wp-content/plugins/super-forms/uploads/php/files/vlb85q1n335djoqu6ekekj1qp0/2195697597.pdfIn PDF document text
    • https://singaporeroadshow.com/wp-content/plugins/super-forms/uploads/php/files/ac4d8b6eefb95771173af4ac1c52f5a0/95022933126.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1KS0DP0cxss/uplcv?utm_term=how+to+get+free+star+coins+2020PDF 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_off0000c41f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC41F 10784 bytes
SHA-256: a20a99738b9269dbd40e3115d2dd4bd4439f04e7c70c6aabaa992f540007ac66
font_01_sfnt_off0000dd33.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD33 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000f545.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF545 15128 bytes
SHA-256: 78c96f384eec718b2e7eda1e643138540551838f6f97032ad843482517d0d1b9

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