Malicious PDF — malware analysis report

Static analysis result for SHA-256 2d995c3debb1a8dd…

MALICIOUS

PDF

97.1 KB Created: 2021-08-11 05:26:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 6e0f710ac9d7fef548c24700aac07c03 SHA-1: 60c2a72cb8672017c757429baaf1e01cd472b3d3 SHA-256: 2d995c3debb1a8dd33c1810bf053e229d3928eedbdd32e3771190d8f00a7049e
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains a link farm with numerous URLs pointing to compromised WordPress upload storage and other disposable hosting. The ClamAV detection indicates it is a phishing trojan. While no scripts were explicitly extracted, the structure and URL patterns suggest an attempt to lure users to malicious sites, likely for phishing or to download further malware.

Machine Learning

  • Nyx PDF Classifier clean score 0.1206

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 http://bitite.lv/media/txt/122/file/33949232293.pdf In PDF document text
    • http://ardechetendancebrut.fr/userfiles/ardechetendancebrut.fr/file/fobomegelukoredep.pdfIn PDF document text
    • http://longarmquiltacademy.com/fckeditor/userfiles/file/67192074585.pdfIn PDF document text
    • https://brusroom.com/wp-content/plugins/super-forms/uploads/php/files/9471a3478abf8d3883a873b1e3273715/badipurubitozeriwow.pdfIn PDF document text
    • https://robinio.de/wp-content/plugins/super-forms/uploads/php/files/pljmqm62q54nr2de25o98pdbq1/xolotaloladasoxeg.pdfIn PDF document text
    • http://fletcherfamilyreunion.org/clients/52745/File/pevopeziburesavix.pdfIn PDF document text
    • https://thegioibaobicarton.com/Images_upload/files/27229738244.pdfIn PDF document text
    • http://i-daa-wl.de/userfiles/radipimovubalaz.pdfIn PDF document text
    • https://singaporeroadshow.com/wp-content/plugins/super-forms/uploads/php/files/cac62ea1988e9c3468f9bb216c4a7919/jesugamebafinolirotokepus.pdfIn PDF document text
    • https://meesens.be/KrMee/Tekstverwerker/82720032137.pdfIn PDF document text
    • https://yournew.site/wp-content/plugins/super-forms/uploads/php/files/ho68vs4oii21fnoqd5guus3srv/35396627211.pdfIn PDF document text
    • http://www.euro-fly.eu/userfiles/files/motupag.pdfIn PDF document text
    • http://www.radiopopiatej.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c4ef974750---jilenelutamuwevi.pdfIn PDF document text
    • http://playbabydoll.com/userfiles/file/widexorilifukafalekitaz.pdfIn PDF document text
    • http://vasset.bg/userfiles/file/54021898887.pdfIn PDF document text
    • https://pikewallis.no/wp-content/plugins/formcraft/file-upload/server/content/files/160f026709221a---mumuxuxedamefaboxuva.pdfIn PDF document text
    • http://praguetransfer.com/files/file/pijek.pdfIn PDF document text
    • http://animalscipublisher.com/files/upfiles/file/dezisamuno.pdfIn PDF document text
    • http://akgikorea.com/file_upload/fck_upfile/file/6487211523.pdfIn PDF document text
    • https://amartzon.store/wp-content/plugins/super-forms/uploads/php/files/c0f84fcc9076de37891ba2c70ded1472/wagixugokuvemubokozesoda.pdfIn PDF document text
    • http://kaztelcom.kz/ckfinder/userfiles/files/xiwidexuxupezozagewirej.pdfIn PDF document text
    • http://gpszone.hu/upload/userfiles/file/91271115696.pdfIn PDF document text
    • https://bikinibody.be/wp-content/plugins/super-forms/uploads/php/files/q5o9osafnoifirqqecim37mh27/3052067742.pdfIn PDF document text
    • https://propbrains.com/wp-content/plugins/super-forms/uploads/php/files/b40fd267d471ff7f47f494b6a6bfcca3/piviji.pdfIn PDF document text
    • http://eske.hu/wp-content/plugins/formcraft/file-upload/server/content/files/1606f44726ee4f---6510184415.pdfIn PDF document text
    • https://lorenzonimmigrationlaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c3473c91141---994738485.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/S30rS-6n6vg/uplcv?utm_term=what+is+motivation+explainPDF link annotation
    • 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_off000140b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x140B8 10580 bytes
SHA-256: a5d95076b6fad308dd50b4b3d490f3f25b2dab21b985c627541300df66d69a61
font_01_sfnt_off000158bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x158BB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1