Malicious PDF — malware analysis report

Static analysis result for SHA-256 9f7a42ec6d6c898b…

MALICIOUS

PDF

93.6 KB Created: 2021-07-24 11:21:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: ec44c225f6dbf92b485ef4106fe9a803 SHA-1: c4cf994fa0c0fdcd75e567177e8c70dddbff3505 SHA-256: 9f7a42ec6d6c898b3b0b0e7f3f3baa4d6d1956b55da54363c720254e89b553ba
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous links, many pointing to compromised WordPress sites, suggesting it functions as a link farm to distribute phishing or malware. The presence of embedded URIs and the nature of the links indicate an attempt to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9897

Heuristics 7

  • 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.
  • 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.lentilles-progressives.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1607b536c68990---fuvid.pdf In PDF document text
    • http://heydarbaba.org/resimler/files/81695615067.pdfIn PDF document text
    • http://on-video.com/movies/movie_data/file/pemaviwixutujenuxizagus.pdfIn PDF document text
    • http://tauzetaques.com/clients/1/1b/1b95303171b4519794d6fee637ef680e/File/97786313194.pdfIn PDF document text
    • http://lalitas-thaimassage-spa.de/wp-content/plugins/formcraft/file-upload/server/content/files/1606d9b8ef133a---zubunafutobonixesuxelu.pdfIn PDF document text
    • https://www.lavishlook.se/wp-content/plugins/super-forms/uploads/php/files/c11975054015988dce7d64d21bc6d6cb/31289001139.pdfIn PDF document text
    • http://on-video.com/movies/movie_data/file/14187384172.pdfIn PDF document text
    • http://www.taimaobi.com/admin/ckfinder/userfiles/files/folubukogejejejudobimem.pdfIn PDF document text
    • http://rymwid-training.com/userfiles/file/niwonibu.pdfIn PDF document text
    • http://ahkjt.com/upfile/file/daraf.pdfIn PDF document text
    • https://area34.info/wp-content/plugins/super-forms/uploads/php/files/dg9mi8pn0kapl69665tavhj9p2/rejixajubatoga.pdfIn PDF document text
    • http://www.risingstars.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160913a3841eac---67857792914.pdfIn PDF document text
    • http://vegasoft.hr/wp-content/plugins/formcraft/file-upload/server/content/files/160f069d4c57dc---62442933814.pdfIn PDF document text
    • http://www.cuerpomenteyespiritu.es/wp-content/plugins/formcraft/file-upload/server/content/files/160d3de9c190be---26514641471.pdfIn PDF document text
    • https://webmenuplus.com/images/file/93204987598.pdfIn PDF document text
    • http://tutaylamhet.com/storage/ckfinder/files/54211158650.pdfIn PDF document text
    • http://robedecreateur.com/img/files/81240104987.pdfIn PDF document text
    • http://straub-online.ch/userfiles/files/vakitapobow.pdfIn PDF document text
    • http://adhdadvisory.com/wp-content/plugins/formcraft/file-upload/server/content/files/160824244330bb---56181854073.pdfIn PDF document text
    • http://iamsoldierfit.com/wp-content/plugins/formcraft/file-upload/server/content/files/16090dea5bfe20---gorozuridupiwegipi.pdfIn PDF document text
    • http://104.156.58.56/~web2inbox/wp-content/plugins/formcraft/file-upload/server/content/files/1607533c304460---43751864427.pdfPDF link annotation
    • http://springswellness.net/wp-content/plugins/formcraft/file-upload/server/content/files/160d3c4ff359d1---bivarozise.pdfIn PDF document text
    • https://jcmimoveis.com/userfiles/file/xuliwimizezapof.pdfIn PDF document text
    • https://wacee.net/wp-content/plugins/formcraft/file-upload/server/content/files/160b4404ac8505---68019911364.pdfIn PDF document text
    • https://prosegik.com/wp-content/plugins/super-forms/uploads/php/files/958b73359377863e28051aeab8ad3acf/99877085818.pdfIn PDF document text
    • http://15fratrowreunion.com/clients/2/2b/2b18ccadde375fd95e9ac2d5db5aaa67/File/69192402801.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/FevRqgeaUVY/uplcv?utm_term=what+is+the+best+dps+addon+for+wowPDF 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_off00010efd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10EFD 10768 bytes
SHA-256: 09e392719daa4f7a562f43913ada138b9d6a62755eaa06a1ab6551c9d21ec0cc
font_01_sfnt_off0001278e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1278E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00013fa0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13FA0 15852 bytes
SHA-256: a11dafc518f5f64b970a3692f1b9fde3ce8e2a4b393b9e2f51c964a71fb67420

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