Malicious PDF — malware analysis report

Static analysis result for SHA-256 a2faa74c1d08cfc2…

MALICIOUS

PDF

85.1 KB Created: 2021-09-06 23:13:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 1eb59995a8b21b4756922ebd427d1e82 SHA-1: 3beee510d683d8550cddb8580118b760a2b35be6 SHA-256: a2faa74c1d08cfc21a1bd0a2b6d66f851c6b17d53eedfde6a8edd0d56b634e50
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains numerous links to external websites, many of which are hosted on compromised CMS platforms or disposable domains, indicating a link farm designed to distribute malicious content or phish users. The ClamAV detection as 'Pdf.Phishing.Trojan' further supports its malicious nature. No scripts were extracted, but the structure and URL patterns are strongly indicative of a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.2555

Heuristics 5

  • 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
  • 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=geetha+physiology+text+pdf+free+download PDF link annotation
    • https://egyediajandekotletek.hu/mvc/userfiles/file/87977673265.pdfIn PDF document text
    • http://kientrucnhacuagio.com/upload/files/12996938109.pdfIn PDF document text
    • http://righetti-ticozzi.it/userfiles/files/83252368500.pdfIn PDF document text
    • http://www.opencalgary.org/wp-content/plugins/formcraft/file-upload/server/content/files/16096a8e3f1040---78715550014.pdfIn PDF document text
    • https://wilsonbarrera.com/inicio/wp-content/plugins/formcraft/file-upload/server/content/files/160a04c5393756---jebajagujedelivawenele.pdfIn PDF document text
    • http://www.thelawchamber.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608e8c9f39b39---78833333982.pdfIn PDF document text
    • http://alphabodysupplements.com/newerac2c/userfiles/file/zijodo.pdfIn PDF document text
    • https://www.msolartop.cz/wp-content/plugins/formcraft/file-upload/server/content/files/1606cc3492db1e---misududukifuwevon.pdfIn PDF document text
    • https://www.yoursurveysurveyors.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160cff27ae69b5---rajobabepofifosegolu.pdfIn PDF document text
    • http://sahrugs.com/userfiles/file/vogomi.pdfIn PDF document text
    • http://rurisnet.org/images/file/gupusezuvewogon.pdfIn PDF document text
    • http://furmanreunion2021.com/clients/3/37/3732e4fa3878e851f9d164dff32a9cbb/File/fazojorufuredum.pdfIn PDF document text
    • http://www.chicagoalphas.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072e39979c12---zepusotuvugomizezoge.pdfIn PDF document text
    • http://aweibel.com/Photo/file/82808865402.pdfIn PDF document text
    • https://qian-ho.com/upfiles/editor/files/zivukodavegogem.pdfIn PDF document text
    • http://sameiroeventos.pt/ficheiros/buxadepeko.pdfIn PDF document text
    • http://shmountaineering.co.uk/wp-content/plugins/super-forms/uploads/php/files/81m5pcgvmkdsq9apfujla6qbf5/73085014898.pdfIn PDF document text
    • http://www.marcelasemper.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607aab7914ead---gosabo.pdfIn PDF document text
    • http://www.iece.in/userfiles/file/fonurawurodututukojipobo.pdfIn PDF document text
    • https://stakeoutllc.com/wp-content/plugins/super-forms/uploads/php/files/c7e41e06a6d4abd7394625fb698213a3/38985562336.pdfIn PDF document text
    • https://zabulgaria.org/userfiles/file/fujasezavusixerexonepeliz.pdfIn PDF document text
    • http://www.ecvbrass.ch/user/web/file/9935251300.pdfIn PDF document text
    • http://aexpress.lv/index/images/up/file/supuzozafejele.pdfIn PDF document text
    • http://ventima.ru/userfiles/file/zewugapagalof.pdfIn PDF document text
    • https://luyenthitoeic.info/userfiles/file/31699632211.pdfIn PDF document text
    • https://mmszke.hu/files/file/11284099038.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_off00010388.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10388 11120 bytes
SHA-256: d8751d4b3cc3cf6c09f97c0374596ea10399542de6ababfc84ce0cb34af54400
font_01_sfnt_off00011d5d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D5D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1