Malicious PDF — malware analysis report

Static analysis result for SHA-256 69dc5fb06f763dcd…

MALICIOUS

PDF

85.3 KB Created: 2021-09-16 21:10:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 1918b0d743830154ceb0d9042102afaf SHA-1: ff1861834c4827f4f862b4b7a242063de78b1e82 SHA-256: 69dc5fb06f763dcdcbff2c81d313999b811cb8cf6eecbf89dc4c195981fcce50
156 Risk Score

Malware Insights

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

The PDF was flagged by ClamAV as a phishing trojan and ML classifier. It contains numerous embedded URLs, many pointing to compromised WordPress sites and disposable domains, indicating a link farm designed to redirect users to malicious content. The presence of these links and the overall structure strongly suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9860

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://xn--80aap0abfiql8h.xn--p1ai/admin/ckfinder/userfiles/files/pogopederekufazos.pdf In PDF document text
    • https://tractorpulling-emmeloord.nl/upload/file/23845150859.pdfIn PDF document text
    • http://danguykhoidoanhnghiephp.vn/Upload/files/pesujaseviwadusazema.pdfIn PDF document text
    • https://goldenlinejsc.com/userfiles/file/lepukufudepi.pdfIn PDF document text
    • http://locthanhwindow.com/img_duhoc/files/gamofejupoxebovivuwa.pdfIn PDF document text
    • http://www.thebetterinsurance.com/wp-content/plugins/formcraft/file-upload/server/content/files/161388f66c7511---matalutemikikuw.pdfIn PDF document text
    • http://caacoding.net/wp-content/plugins/formcraft/file-upload/server/content/files/16136dddb8b980---63680393742.pdfIn PDF document text
    • https://414movement.com/wp-content/plugins/super-forms/uploads/php/files/65211a6b4ad408e872c632ee06c02561/92613889712.pdfIn PDF document text
    • https://landlorddebtadvisory.com/wp-content/plugins/super-forms/uploads/php/files/1216886bbe30893f9c19ad7eb697a378/tinafapanu.pdfIn PDF document text
    • https://www.verimevzabavu.cz/ckfinder/userfiles/files/95753688397.pdfIn PDF document text
    • http://www.mamafoundation.cz/ckfinder/userfiles/files/rugusimuzagazesurolopula.pdfIn PDF document text
    • http://kammerchor-lindau.com/file/ripovulaxojo.pdfIn PDF document text
    • http://rapet.hu/files/gebepazazojagelotifow.pdfIn PDF document text
    • http://brmxn.com/userfiles/file/20210907170216_5br5cs.pdfIn PDF document text
    • http://alpinedelhi.com/userfiles/files/44823753052.pdfIn PDF document text
    • http://zbirozskepodzamci.cz/userfiles/22458478856.pdfIn PDF document text
    • https://ikorti-iao.com/userfiles/files/31242791299.pdfIn PDF document text
    • https://seedcambodia.org/htdocs/cljr/data/files/99123995622.pdfIn PDF document text
    • https://inprovitperu.com/ckfinder/userfiles/files/rozexatuve.pdfIn PDF document text
    • http://www.onegelha.com/wp-content/plugins/super-forms/uploads/php/files/4f9195290c3b0c92c980d4293f28291c/suroxujaresuwumem.pdfIn PDF document text
    • https://parlagame.com/calisma2/files/uploads/guwinowoju.pdfIn PDF document text
    • http://blekinge.boj.se/uploads/userfiles/files/botuxoviterapune.pdfIn PDF document text
    • http://retco.ge/ckfinder/userfiles/files/suvoxoredez.pdfIn PDF document text
    • http://silarperu.com/UserFiles/file/vususil.pdfIn PDF document text
    • https://pluckywize.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612f8c168e655---sunisod.pdfIn PDF document text
    • http://phucuongplus.com/upload/files/18492816135.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/6naE_Nh8_CY/uplcv?utm_term=the+writer%27s+presence+9th+edition+pdf+online+freePDF 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_off0000e5ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5CE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000fde5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDE5 10804 bytes
SHA-256: ebe9260f2f8c7d078f071dd1b96de73004bb990fb81c9d979a54e73b70adb5c5
font_02_sfnt_off000116db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x116DB 18760 bytes
SHA-256: 18d032927f425fdbdbb1a6bc3359cd15350397f998fb52cc63a4270733717fcf

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