Malicious PDF — malware analysis report

Static analysis result for SHA-256 8da206e3c945f83a…

MALICIOUS

PDF

90.4 KB Created: 2021-08-01 04:41:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: d02819df2ee817955868a350037e3179 SHA-1: 53d72d8ac0c762000343cb07f12a621e518382c9 SHA-256: 8da206e3c945f83a6358cce8bc4319647ff01fa4743cb24b63fbfac32444ea52
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous links pointing to compromised WordPress sites, suggesting a phishing or malware distribution scheme. The PDF structure and embedded links are consistent with techniques used to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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://www.franklinwebdesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aafb1617407---surelagamemezinifesewi.pdf In PDF document text
    • https://gemwares.com/userfiles/file/72164175162.pdfIn PDF document text
    • https://victory-agency.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cc4ad16359---jafikobimoxiruwovaweb.pdfIn PDF document text
    • http://jnnycc.org/userfiles/file/22295974200.pdfIn PDF document text
    • https://bawwabatrizq.com/userfiles/file/40527070758.pdfIn PDF document text
    • https://ifacemount.com/wp-content/plugins/super-forms/uploads/php/files/98hqshd0ile10pl2hc77vuiiqf/duwepedipopolidun.pdfIn PDF document text
    • http://kyanite.tv/userfiles/file/94292746056.pdfIn PDF document text
    • http://www.sunargrup.com.tr/wp-content/plugins/super-forms/uploads/php/files/mpmv79g21v6br01db537hqr4t4/tepijafu.pdfIn PDF document text
    • https://alternativecarrepair.com/userfiles/file/vazavoxodukukukekosido.pdfIn PDF document text
    • https://estigotours.com/wp-content/plugins/super-forms/uploads/php/files/a0ae54e38645d51567e62f4ec8f693bc/nuburid.pdfIn PDF document text
    • http://heorungminhphat.com/luutru/files/sipokebufuliso.pdfIn PDF document text
    • http://hkbroadwin.com/userfiles/tekujegurupanud.pdfIn PDF document text
    • https://aykutemlak.com/upload/ckfinder/files/80239731871.pdfIn PDF document text
    • http://luckyassessoria.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160b8287e41cb1---49317190986.pdfIn PDF document text
    • https://kodeac.com/wp-content/plugins/super-forms/uploads/php/files/kfa7742qlo08i6lrgtncmc5877/7353282430.pdfIn PDF document text
    • http://classtool.info/upload/files/43579463022.pdfIn PDF document text
    • http://www.onegelha.com/wp-content/plugins/super-forms/uploads/php/files/eeda777afbef3aa88a40aa31dc6b3d72/fekelanotodafusejeg.pdfIn PDF document text
    • http://edwindijk.nl/home/edijk/domains/edwindijk.nl/public_html/uploads/file/15624294238.pdfIn PDF document text
    • http://cungcapluonech.com/upload/files/46391054784.pdfIn PDF document text
    • https://www.sgestrecho.es/wp-content/plugins/formcraft/file-upload/server/content/files/16100beaeb9155---44046377450.pdfIn PDF document text
    • http://hotararicedo.ro/files/files/dulasinodi.pdfIn PDF document text
    • https://learningsolution.ca/userfiles/files/xoletumalimafax.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/GLLx1DTH0VQ/uplcv?utm_term=glitch+app+android+apkPDF 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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fedf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEDF 10440 bytes
SHA-256: 2e861e97bb8728c2d2c643cba6d54c9228d3b9fad2e932113804667bd126e974
font_01_sfnt_off00011670.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11670 17348 bytes
SHA-256: 302cb0455dc69a6fb6148c305ebacb8b9c10fb3818c12665136709e5f20ebd61
font_02_sfnt_off000143b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x143B0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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