Malicious PDF — malware analysis report

Static analysis result for SHA-256 96878ddf45b7a093…

MALICIOUS

PDF

111.8 KB Created: 2021-08-24 19:23:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: fe9b9323e5cba79687ec2f7f04131b94 SHA-1: 4f2fcd6e309d231bd0b1ce0b0edaaac6301e2bbf SHA-256: 96878ddf45b7a093e4073a1cec33f873e51c4fbb779ad5c18f108dfaa3e1678e
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains a link farm pointing to numerous compromised WordPress upload directories and other disposable hosting sites. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. The presence of multiple links on potentially compromised or disposable hosting suggests an attempt to obscure the final destination and evade detection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9966

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
  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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/160b7b1e31019d---40010575781.pdf In PDF document text
    • http://mjsolankifoundation.com/fck/imagesfile/tafonezugetapebilopirotu.pdfIn PDF document text
    • https://luminex.pl/upload/file/41279754991.pdfIn PDF document text
    • http://jagatjyotischool.org/jagatjyotischool/userfiles/file/xubakox.pdfIn PDF document text
    • http://xn--b1ahhafccpgkb2bxo.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/27f163f5328775e212e437b1be293231/gemetokirefenuniwebemofi.pdfIn PDF document text
    • https://iamtimeshare.com/userfiles/file/fubofebekejagegita.pdfIn PDF document text
    • http://trainternational.in/wp-content/plugins/formcraft/file-upload/server/content/files/16092c02b8c282---selus.pdfIn PDF document text
    • https://dazzlin.co.uk/wp-content/plugins/super-forms/uploads/php/files/22651118f083e1d276205d80dc724e0a/zojozajevolipo.pdfIn PDF document text
    • https://multimetrics.com/ckfinder/userfiles/files/61643224635.pdfIn PDF document text
    • https://felicitareonline.ro/ckfinder/userfiles/files/19238731277.pdfIn PDF document text
    • http://jfhcoaching.com/userfiles/files/81377285972.pdfIn PDF document text
    • https://ikima.fr/uploads/file/90612549586.pdfIn PDF document text
    • http://accessprecision.com/userfiles/file/18010382754.pdfIn PDF document text
    • http://www.jimenez-casquet.com/wp-content/plugins/formcraft/file-upload/server/content/files/16085567cad797---segijejababodefu.pdfIn PDF document text
    • https://glaze-metalart.com/upload/files/42299693235.pdfIn PDF document text
    • http://caacoding.net/wp-content/plugins/formcraft/file-upload/server/content/files/160bd0aba5f7b3---49644774859.pdfIn PDF document text
    • https://pasarangroup1.com/contents//files/zulusanoxilobawod.pdfIn PDF document text
    • http://10glazsikeyrosa.ru/file/norirosu.pdfIn PDF document text
    • http://asirius.su/wp-content/plugins/super-forms/uploads/php/files/ab544dbaca69c68c9a22444127770535/zufujapajid.pdfIn PDF document text
    • http://adhdadvisory.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609e2f5fe4f68---1382882700.pdfIn PDF document text
    • https://landbondcorten.com/attachment/file/cc1985ba13dddd568ef2c759475a3a35.pdfIn PDF document text
    • http://www.petersmetalstitching.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16081fa95b347d---95360854137.pdfIn PDF document text
    • https://nsck-cykelmotion.dk/userfiles/file/xofevekon.pdfIn PDF document text
    • http://titusrelay.com/clients/e/ef/ef304ccc03541e9e6382bef5f13b0a7d/File/56676904967.pdfIn PDF document text
    • https://retentionstudentexperience.com/wp-content/plugins/formcraft/file-upload/server/content/files/1611f562c6bba3---kabezevivabinugame.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/cv9VXjIrmdE/uplcv?utm_term=the+challenge+rivals+2+castPDF 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_off00015203.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15203 17972 bytes
SHA-256: 40fba476110261b9231789648ea74b9624a1ef1e7623e68b9c3d9f091763af10
font_01_sfnt_off00018120.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18120 10540 bytes
SHA-256: 1662e0a9e38e3f5119d9801c49651e150aa6c610e3029036a151c66af7c68515
font_02_sfnt_off0001992b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1992B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1