Malicious PDF — malware analysis report

Static analysis result for SHA-256 89a245d5d6440886…

MALICIOUS

PDF

90.5 KB Created: 2021-07-26 08:47:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: b2953c926f43df0f3aabd216479514fe SHA-1: c3f2c8b9455506490dad4de4da16da650d030660 SHA-256: 89a245d5d6440886f2bf95bbdbc92c161938482bbc51d37b06cec62c3d0bcef9
164 Risk Score

Malware Insights

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

This PDF document is identified as malicious by ClamAV and an ML classifier, exhibiting characteristics of a phishing and link farm attack. It contains numerous links, many pointing to compromised WordPress upload directories, suggesting an attempt to lure users into downloading further malicious content or visiting phishing sites. The presence of a 'download' button lure reinforces this malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9905

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://assurancemauricie.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608a1dc8c9da8---xajerokeva.pdf
    • https://divinenine.net/userfiles/file/bekarixiletaxemi.pdf
    • http://www.kissdocs.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160c1cc9d6d75d---dejirononasopa.pdf
    • http://vudafrique.com/wp-content/plugins/super-forms/uploads/php/files/3d73711bc49eb18fa7be25b0c7f60b7c/17851981145.pdf
    • https://halobysciton.com/wp-content/plugins/formcraft/file-upload/server/content/files/16076d0b9b7e91---31945585726.pdf
    • http://atlantichomeportugal.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609fa8998b0ba---josolipezivedezipoz.pdf
    • https://estigotours.com/wp-content/plugins/super-forms/uploads/php/files/2a1286cc9ce647764990ef7c2c54e3e2/jixifujagodakolesonod.pdf
    • https://dungcuruamui.com/wp-content/plugins/super-forms/uploads/php/files/2d8cgl3a2389kpobtctfo6mcgd/kupajuterab.pdf
    • https://okud-istra.hr/userfiles/file/vujafokufosazijuko.pdf
    • http://theettiaresottawa.org/clients/e/e8/e8f54e69a7463df9fd0adff13cd8e90f/File/70468719839.pdf
    • http://leilehua76.com/clients/4/4d/4d80c013f15dbe3c797666a457780dca/File/jamipewunun.pdf
    • http://huntland.hu/upload/file/xedizabajavarogiteputig.pdf
    • https://whiteplacard.com/UserFiles/file/5754477788.pdf
    • https://yournew.site/wp-content/plugins/super-forms/uploads/php/files/8sfc96ev88a41dk07sijt5opun/36508496372.pdf
    • http://accessiblevehicleservices.com/userfiles/file/bodevazixibobaku.pdf
    • https://www.nordatec.com/wp-content/plugins/super-forms/uploads/php/files/nt14agh0dlqletas2a0sl0nd97/wanotibibexire.pdf
    • http://khanaphatgroup.com/UserFiles/file/fipixudupativafadevosi.pdf
    • http://portalpr-b2b.es/img/user///file/_0099539001625660378.pdf
    • https://fietenhaardenenkachels.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1609eb910a8a99---70965662493.pdf
    • http://ca1970.com/clients/10044/File/88383752667.pdf
    • http://svenstavik.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a18b5458ad4---17937114328.pdf
    • https://beaufortbond.com/wp-content/plugins/super-forms/uploads/php/files/bf2531a090c18ec5ae45c0bf70f278ff/23195075189.pdf
    • http://aeskulap24h.de/wp-content/plugins/formcraft/file-upload/server/content/files/1609c87634bdb2---kulapogulapekodaso.pdf
    • http://www.kotolantopeni.cz/files/80944137962.pdf
    • https://midasspa.com/ckfinder/userfiles/files/bopigimati.pdf
    • https://123kozijnofferte.nl/wp-content/plugins/super-forms/uploads/php/files/03qkbs91umid7mfv1vd2isir97/74204149665.pdf
    • https://dichocungtoi.com/userfiles/file/pevajojudofalawazumu.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/FevRqgeaUVY/uplcv?utm_term=streamlabs+prime+crack+pc
    • 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fe8f.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xFE8F 16792 bytes
font_01_sfnt_off000116a6.bin
0dc99726fa4e01a155030b116f65e08bf7ab9a96af3ea5a954f2c0a2320f6bd1
pdf-font-stream PDF embedded font (sfnt) at offset 0x116A6 10616 bytes
font_02_sfnt_off00012eb3.bin
31cc03ea964694455399dd04c21c13364be56fdc8818bd8a36fee97505ba2f42
pdf-font-stream PDF embedded font (sfnt) at offset 0x12EB3 17120 bytes