Malicious PDF — malware analysis report

Static analysis result for SHA-256 886c7489239281cb…

MALICIOUS

PDF

78.1 KB Created: 2021-07-15 21:32:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: f1e250109876f3977862588dc379ca6d SHA-1: 8bd1b7dae1b2396f8437def87c03c20315370308 SHA-256: 886c7489239281cbac729ce7dbb16ca73a9a79d3e933ab8ec56ef44fe7f0bfa5
124 Risk Score

Malware Insights

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

The file was detected as a phishing trojan by ClamAV. Static analysis revealed it functions as a link farm, containing numerous URLs pointing to compromised WordPress sites. These links likely lead to phishing pages or further malware downloads, indicating a malicious intent to deceive users.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.2770

Heuristics 5

  • 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
  • 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://garglob.ru/uplcv?utm_term=un+high+commissioner+for+refugees PDF link annotation
    • http://www.dj-csnl.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1608cfc8a57307---4284755639.pdfIn PDF document text
    • https://dtcprojects.com.au/wp-content/plugins/super-forms/uploads/php/files/nomta3vc08ilc6gge6v1e4amsf/kasipe.pdfIn PDF document text
    • http://aeronautike.com/userfiles/file/14198145815.pdfIn PDF document text
    • http://taiyoaquris.cn/upload/userfiles/files/20210623050108.pdfIn PDF document text
    • https://qualitycountscleaning.com/wp-content/plugins/super-forms/uploads/php/files/10e1b59b15b731d315604008a72a27de/dutapulesuzela.pdfIn PDF document text
    • http://geometrarontani.it/userfiles/files/xapuduzovasazuzuwuk.pdfIn PDF document text
    • http://belovosushi.ru/files/65040812345.pdfIn PDF document text
    • https://elicopter-de-inchiriat.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160c3f6f3edac9---refowuwitilawibawe.pdfIn PDF document text
    • http://jirehenl.com/userfiles/file/280228308723.pdfIn PDF document text
    • https://fitnessrev.net/wp-content/plugins/super-forms/uploads/php/files/4n895tpa5dk2cbqrf9g9jclqtr/wagaxaw.pdfIn PDF document text
    • http://bsl-trans.ru/admin/ckfinder/userfiles/files/51945500030.pdfIn PDF document text
    • http://claudiodauelsberg.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160add48a559ee---84826114491.pdfIn PDF document text
    • https://otdelkamos.ru/wp-content/plugins/super-forms/uploads/php/files/d122fe79d60d24aff06630b0f897c0f5/gosuvilefipowanu.pdfIn PDF document text
    • https://amrapalispot.com/userfiles/file/pusigotopetuxu.pdfIn PDF document text
    • https://www.sadcmedia.com/wp-content/plugins/super-forms/uploads/php/files/rbencik8vov7t8tnl94hv0ojm5/31065519402.pdfIn PDF document text
    • http://milcontabil.com.br/wp-content/plugins/super-forms/uploads/php/files/a0m0tp6erp8qrlo875187kpqd3/36619440176.pdfIn PDF document text
    • http://graphicon.hu/wp-content/plugins/formcraft/file-upload/server/content/files/1608d8b6710b14---34899567879.pdfIn PDF document text
    • https://sketchup360.vn/wp-content/plugins/super-forms/uploads/php/files/ae48d50950t6bu5cqoi6fomt6v/bamidaxozal.pdfIn PDF document text
    • http://portamarioarchitetto.eu/userfiles/files/pavavojutudamazumapupe.pdfIn PDF document text
    • https://www.ogblfrontaliers.fr/wp-content/plugins/super-forms/uploads/php/files/drhhe7jucf35v08hghu8f3khi0/sakaletaguwobejovofavap.pdfIn PDF document text
    • http://cohn-vossen.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f56fb4cd39---xoxinedo.pdfIn PDF document text
    • https://ateneoarbonaida.com/wp-content/plugins/formcraft/file-upload/server/content/files/160abaf9764945---23501592905.pdfIn PDF document text
    • https://www.jahnigterbraak.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16072b3196ac56---90750258109.pdfIn PDF document text
    • https://www.tai.gr/wp-content/plugins/formcraft/file-upload/server/content/files/160a0faed9f86c---mufanemejazomogup.pdfIn PDF document text
    • https://flvirginia.com/wp-content/plugins/super-forms/uploads/php/files/b7896b578bae377bd92a2741e10237b4/vikevefipevinivisoko.pdfIn PDF document text
    • https://kvkumariajnkvv.org/singhania/downloads/file/xepakesozunogi.pdfIn PDF document text
    • https://travelworld.ro/userfiles/file/59723136814.pdfIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f390.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF390 10584 bytes
SHA-256: f23643403ba919b035ee6cd1641dfb3ddc5562743239eb7359f76f1da2ee6ec4
font_01_sfnt_off00010b80.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B80 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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