Malicious PDF — malware analysis report

Static analysis result for SHA-256 8ba29119fcc684df…

MALICIOUS

PDF

78.5 KB Created: 2021-09-16 21:23:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 18797d06fb7fc523a6ad197637843570 SHA-1: dd43fa063e41985833d7b3eedd6042bdd03cda50 SHA-256: 8ba29119fcc684df39f5ef7939dc32393f2fe2a94a8e567c506e535c2aee22ad
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ClamAV as a phishing trojan and by an ML classifier with high confidence. It contains numerous links to external PDFs hosted on compromised websites, suggesting a link farm designed to redirect users to malicious content or phishing pages. The presence of embedded URLs and the nature of the heuristics indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9968

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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 https://inwebjor.ru/uplcv?utm_term=tom+gold+run+game+download+apk PDF link annotation
    • http://topopentertainment.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613a0c862ff96---rasoditasuboparisoj.pdfIn PDF document text
    • http://herodumpsterrental.com/wp-content/plugins/super-forms/uploads/php/files/fd5cd0e06b657952ce02579dd7ef2e1b/takorigopodedulopod.pdfIn PDF document text
    • http://kystop.com/wp-content/plugins/super-forms/uploads/php/files/83896ecde6821cad7d675c15ddf966df/fowavunevopolijogogawena.pdfIn PDF document text
    • https://desco.scp.hr/files/82261638718.pdfIn PDF document text
    • http://everestlodgelukla.com/userfiles/file/24520039295.pdfIn PDF document text
    • http://immopolignano.lu/images/zanalisilufigixe.pdfIn PDF document text
    • http://cosmik-kinoteatr.ru/sadm_files/gevisedulixe.pdfIn PDF document text
    • https://dispomydeal.com/wp-content/plugins/super-forms/uploads/php/files/a73a1e9ad7134350be230815bfa6fa4f/moxokireluzi.pdfIn PDF document text
    • http://needychild.org/ckfinder/userfiles/files/57426287813.pdfIn PDF document text
    • https://goldengatetaichiqigong.com/userfiles/file/refan.pdfIn PDF document text
    • http://sonnenheizungen.ch/fckeditor/editor/images/file/47297096764.pdfIn PDF document text
    • https://auf.vn/wp-content/plugins/super-forms/uploads/php/files/uq0qq71q6niknq9p9pqk42jbv3/13648463159.pdfIn PDF document text
    • https://alsultantrading.ae/userfiles/files/sedikanuw.pdfIn PDF document text
    • https://pluviaterra.mx/wp-content/plugins/super-forms/uploads/php/files/f15700373964b4c09518930479c5f6f7/sojopimoban.pdfIn PDF document text
    • http://wksystems.net/HotelEstimator/userfiles/file/zetijipagirumidoburap.pdfIn PDF document text
    • https://hotelritariccione.it/wp-content/plugins/formcraft/file-upload/server/content/files/161399bbd4afe9---wofud.pdfIn PDF document text
    • http://shanghaiqingchen.com/upload/files/zibenugetinulokewededa.pdfIn PDF document text
    • https://equantumconsulting.com/files/files/19776327142.pdfIn PDF document text
    • http://seattleteriyaki3.com/uploads/files/kerebavowevugojiw.pdfIn PDF document text
    • http://espaciocultivarte.com/ckfinder/userfiles/files/pobore.pdfIn PDF document text
    • https://retentionstudentexperience.com/wp-content/plugins/formcraft/file-upload/server/content/files/16133c693a2b88---falijozebokoja.pdfIn PDF document text
    • https://cailux.lu/userfiles/files/duwozadabuteberoz.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_off0000c7c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC7C8 20532 bytes
SHA-256: d9af6cd6f363c6ad1ddd59941dd4dfa2665e3f7d5ce2cedf7dab11a913f61dc1
font_01_sfnt_off0000fc6d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC6D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011484.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11484 10620 bytes
SHA-256: d693fdc620b4744d660c6d37db1b498f9f258c38729c4591cd167a70d4ebb05e

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