Malicious PDF — malware analysis report

Static analysis result for SHA-256 7e477c452dd5ccf1…

MALICIOUS

PDF

91.2 KB Created: 2021-06-26 06:04:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: c846ec546a497bb98d96f97cfad4bc14 SHA-1: 2744ba691ed4cd9102c3c8346fb9dcb573877402 SHA-256: 7e477c452dd5ccf17360b6428b56658310a05d57c017d3a10265516298936a34
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating it is likely a phishing or malware distribution lure. The numerous embedded URLs point to compromised websites and link farms, suggesting an attempt to redirect users to malicious content. The file's structure and the presence of many external links are consistent with a phishing or spam campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9924

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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 https://archism.ru/uplcv?utm_term=tizzy+meaning+in+tamil
    • https://www.verpoort-bouw.be/wp-content/plugins/formcraft/file-upload/server/content/files/160a53ab23c351---suwalofelutelugipep.pdf
    • https://actor-conseil.com/files/file/64805940628.pdf
    • http://rustproofingottawa.com/userfiles/file/pigeratujige.pdf
    • https://rubin2000-distribuitorshop.ro/userfiles/file/89933853226.pdf
    • https://ahi.com.ua/wp-content/plugins/super-forms/uploads/php/files/ded5efe87fca996513dd3eb6980fcd47/66958407738.pdf
    • http://campbellelectronics.com/uploads/namukukodiwafuref.pdf
    • https://smoothnomad.com/wp-content/plugins/super-forms/uploads/php/files/8vivopq80ovfduu1v8pj3q76hn/573654208.pdf
    • https://givemeit.ru/wp-content/plugins/super-forms/uploads/php/files/69db72ed59098038158bd39ad30f37c7/wewomujujorose.pdf
    • http://baigeleather.com/userfiles/file/24303362984.pdf
    • https://totalyoumovement.com/wp-content/plugins/formcraft/file-upload/server/content/files/16078f2d8695c4---2022565002.pdf
    • https://eravukappalpalli.com/userfiles/file/pibanede.pdf
    • https://kindliving.org/wp-content/plugins/super-forms/uploads/php/files/tmp/65292300974.pdf
    • https://growlocals.com/wp-content/plugins/super-forms/uploads/php/files/ce851a95863797c12e6a491015df0ea6/fedenudegelifikowofe.pdf
    • http://www.jcca.co.in/wp-content/plugins/formcraft/file-upload/server/content/files/1609cfcc9d4e03---76696269323.pdf
    • http://bizwd.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a3aa4768ea---bufowifuxukuxopaxek.pdf
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608692f4c6f7e---80924041445.pdf
    • http://luckyassessoria.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16087de229e98e---tejirejukuzili.pdf
    • https://earthchartercities.org/wp-content/plugins/formcraft/file-upload/server/content/files/1609cf70be2efb---gamizofewofav.pdf
    • http://permianhighschool1970.com/clients/e/ef/efee9fcbc667252fc4b649c8163d3733/File/nekizo.pdf
    • http://www.franklinwebdesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cb81fb668a---peluwabab.pdf
    • http://absolutelyneon.com/userfiles/file/gunivisibolodemokotuvi.pdf
    • http://maynenkhiinverter.com/media/ftp/file/88117835545.pdf
    • https://dubigroup.com/admin/fckeditor/editor/filemanager/connectors/upload/file/lowowozodufexadejaru.pdf
    • https://www.capitalroofingct.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a27999865d2---84914492393.pdf
    • https://kayakbranson.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606ca6630b31e---jibizetoruvowir.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e8e7.bin
f05da4813bb7a2727f581019fedcc398d178a8ba662c625a9da202a6d73b157b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE8E7 7880 bytes
font_01_sfnt_off000103fc.bin
6b4f0e6ff9371e0f9a0007661d1aaaf6cae9a61ba53ee55d9d271a0048d2c61a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x103FC 10200 bytes
font_02_sfnt_off00011ad9.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11AD9 16792 bytes
font_03_sfnt_off000132eb.bin
58fde58b72b13d4234c11a940f37909a5cc79b8ce9f49b824c167f4f749f3d0a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x132EB 16708 bytes

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