Malicious PDF — malware analysis report

Static analysis result for SHA-256 eacda25082d368d8…

MALICIOUS

PDF

180.6 KB Created: 2021-07-03 08:09:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: fc87023f5bd1c50b9bef32e6c32d6018 SHA-1: ede68a2a7026af044dccd803e830d739d385cb12 SHA-256: eacda25082d368d8a759d588c890a800588b1e8370b33bd8e4a3bd7115700082
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier, indicating malicious intent. It contains numerous links to external websites, many hosted on compromised CMS platforms, suggesting it functions as a link farm to distribute phishing or malware payloads. While no scripts were directly extracted, the structure and heuristic firings strongly suggest a malicious document designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9652

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://wwpokebar.com/uploads/files/7708156961.pdf In PDF document text
    • https://autosofortkauf.ch/wp-content/plugins/super-forms/uploads/php/files/ja1phdl77oui7r45vtlmquq1bs/33204874400.pdfIn PDF document text
    • https://www.breastcancerfoundation.in/wp-content/plugins/super-forms/uploads/php/files/6b6b303a84e71a2bf648b276f7c5502e/33150806490.pdfIn PDF document text
    • https://investainternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/16078881d2254f---nuramenejafudejone.pdfIn PDF document text
    • https://www.baptistenhardenberg.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1608b8385086ca---dofadex.pdfIn PDF document text
    • https://larrialdiak.es/files/galeria/files/popejaritepamobova.pdfIn PDF document text
    • http://cw-cut.com/uploads/file/18353754030.pdfIn PDF document text
    • http://china-engine.net/ckfinder/userfiles/files/94451330802.pdfIn PDF document text
    • http://kmkonsult.cz/userfiles/file/batog.pdfIn PDF document text
    • https://www.hit-education.com/wp-content/plugins/super-forms/uploads/php/files/j1if5dbblu2ugf54k8pphiliej/vajadigora.pdfIn PDF document text
    • https://tfnd.org/wp-content/plugins/super-forms/uploads/php/files/edb5b1b7838dce6592fe3fa417309473/fuvenipizokeretev.pdfIn PDF document text
    • http://www.chatanakonci.cz/userfiles/file/76343561846.pdfIn PDF document text
    • https://cullinanconstruction.com/wp-content/plugins/super-forms/uploads/php/files/593sf5us1tvma95pnvi01h9ogj/76837217165.pdfIn PDF document text
    • https://www.mozartcantat.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1609219abb8448---8094940893.pdfIn PDF document text
    • https://earthchartercities.org/wp-content/plugins/formcraft/file-upload/server/content/files/160dad32a08f68---49286706147.pdfIn PDF document text
    • http://woori-tour.kr/FileData/ckfinder/files/20210703_A38C761CAEFECB28.pdfIn PDF document text
    • http://multiseal.com.ph/wp-content/plugins/formcraft/file-upload/server/content/files/160bb8d5ea51ae---gajeponabijemigatafuzixe.pdfIn PDF document text
    • https://bettyloupaints.com/userfiles/files/93160621963.pdfIn PDF document text
    • https://lllk.ru/wp-content/plugins/super-forms/uploads/php/files/438c5a8f653c34b01606727d61a89d82/50035701402.pdfIn PDF document text
    • http://thaihotelsale.com/FileData/ckfinder/files/20210606_3906F2D74C6A6CD7.pdfIn PDF document text
    • http://mfplus.ba/wp-content/plugins/formcraft/file-upload/server/content/files/160ba280186a64---37128183924.pdfIn PDF document text
    • https://bonpetsupply.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608b17ad8afd4---nemirafalinibibodawitogeg.pdfIn PDF document text
    • https://living-stone.lu/userfiles/files/fitofobomemotowedi.pdfIn PDF document text
    • http://bascobrunswick.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160d1fbfacd2f7---86894592192.pdfIn PDF document text
    • https://www.ediliziaindustriale.com/wp-content/plugins/formcraft/file-upload/server/content/files/160becc257a3c3---jezupoz.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BvfzZFkJO3s/uplcv?utm_term=how+long+do+it+take+neckbones+to+cookPDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000243cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x243CC 16716 bytes
SHA-256: 8b138668b0afb116c7870c0bb538c953af48b6f2d2f9c7951d1a58d3a0200611
font_01_sfnt_off00025ae6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x25AE6 20432 bytes
SHA-256: 88e16a88d6ef9a61b4e4aebe3d34a32dec0109efce59261f2ca5b7a44b67dfac
font_02_sfnt_off0002914f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2914F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_03_sfnt_off0002a966.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2A966 10752 bytes
SHA-256: 553f51b44fe5b3ca55ef6de68a0964c1993121ae16461e7cf3a1659a7a616dfb

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