Malicious PDF — malware analysis report

Static analysis result for SHA-256 df69172049ae9798…

MALICIOUS

PDF

93.6 KB Created: 2021-07-28 04:44:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 0c72bfcad8db0a4fd92c31a1f4159210 SHA-1: f746e1e4403021cc17cb5654ae98df291638579e SHA-256: df69172049ae979881d5d5f9c4f040e3bcccade72db0f1f44aed248422a66a84
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It functions as a link farm, with numerous embedded URLs pointing to various domains, including those hosted on compromised CMS platforms. The presence of these links suggests an attempt to lure users to malicious sites for further exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9954

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://albino-pitti.com/pub_img/file/97843266491.pdf
    • http://inspirationallabels.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16090693782492---88531048197.pdf
    • https://pametnidom.hr/pametne_kuce/userfiles/file/52254986338.pdf
    • http://tangiahoang.com/skinkorea/Images_upload/files/jixopulukitesakaru.pdf
    • http://myphamlulanjina.com/upload/files/75549021263.pdf
    • http://mdsalon.ru/img/lib/file/13248428439.pdf
    • http://pozitron-s.ru/userfiles/file/20311213800.pdf
    • http://pc-driver.ru/userfiles/files/pigodafujux.pdf
    • http://zonwering-belgie.com/ckfinder/userfiles/files/ladiviluwinubabosoragumo.pdf
    • http://drprdesaihospital.com/uploads/82997314843.pdf
    • https://www.denisonlandscaping.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607728312c47b---rimekewisopozi.pdf
    • http://baharemadinah.com/wp-content/plugins/formcraft/file-upload/server/content/files/160751b6c7180b---mavuwexeko.pdf
    • https://www.landalastadservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/16085ed5e5e098---78771497354.pdf
    • http://cameronhaddock.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ad190e22651---godijamavaka.pdf
    • https://grand-forge.ru/wp-content/plugins/super-forms/uploads/php/files/fdbef33686ad78b4ca5d51a54340b719/41358506536.pdf
    • https://thuaphatlaihoanghuy.com/uploads/files/fovozifalenu.pdf
    • https://webtraffic.ch/wp-content/plugins/super-forms/uploads/php/files/e5lulu76ga5seq85oihh0hgu0c/96667158039.pdf
    • http://www.sunarsurdurulebilir.com/wp-content/plugins/super-forms/uploads/php/files/tpc5vhgo0b1r14nf2rbishbac3/topujabus.pdf
    • https://www.lightingsolutionsinc.net/wp-content/plugins/super-forms/uploads/php/files/32fb6b83ba77737c6fab01fc3189d509/16367197270.pdf
    • http://progfin.pl/userfiles/file/dopazanuzage.pdf
    • http://ore-processing.ru/d/files/lenunakuxadudepatefij.pdf
    • https://zold-kommando.hu/files/33275911250.pdf
    • https://churchosonline.com/wp-content/plugins/super-forms/uploads/php/files/1a665b94b79530a86bf2d9ddafef763b/93077137190.pdf
    • http://terhautz.com/upload_files/files/41346211780.pdf
    • https://creativesilhouettes.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160c7ad492b564---vidotivaw.pdf
    • http://whkmradio.com/userfiles/file/wewaxi.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/S30rS-6n6vg/uplcv?utm_term=free+download+rapidex+english+speaking+course+book+pdf+in+kannada
    • 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_off0000eff4.bin
4ea9f8bbec727f637f36c5457245f348b8c20b5a1607d7acab8837411c1d37a3
pdf-font-stream PDF embedded font (sfnt) at offset 0xEFF4 11300 bytes
font_01_sfnt_off00010a02.bin
accb4884687d98007df1ac9f9dcf02cbb63f964d1bb7f6850797eafeff909bea
pdf-font-stream PDF embedded font (sfnt) at offset 0x10A02 17392 bytes
font_02_sfnt_off0001374d.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x1374D 16792 bytes
font_03_sfnt_off00014f5e.bin
fcca37035df06e555c2991ff65faa0e8497ca6423bee408ebc46b3aef925b516
pdf-font-stream PDF embedded font (sfnt) at offset 0x14F5E 16144 bytes