Malicious PDF — malware analysis report

Static analysis result for SHA-256 0020ee977121cde2…

MALICIOUS

PDF

81.8 KB Created: 2021-09-12 07:27:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 6c97692dca959bcc50c7981478eff7f2 SHA-1: 2536f91c7b01c16ea5381c7aecd43019023b090d SHA-256: 0020ee977121cde27f90fab823f8192bb8d26528f9b0c15f715982eb7e6d4c88
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous links, many pointing to compromised WordPress sites and disposable hosting, suggesting a link farm designed to redirect users to malicious content. While no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8284

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
  • PDF differential parser failed info PDF_DIFFERENTIAL_PARSE_FAILED
    The cross-check parser (pdfminer.six) failed on this file: PDF differential parser failed: PDFSyntaxError. Static heuristics still ran and any of their findings above are valid; only the differential cross-check signal is missing.
  • 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://www.rogierstoel.nl/wp-content/plugins/super-forms/uploads/php/files/ndfgpuluuj50rjhc2t88lsvek3/nevazuvubijorudakeku.pdf In PDF document text
    • http://eiffelflowersquesnel.com/userfiles/file/fatinevafemosar.pdfIn PDF document text
    • http://ogcdc.org/uploads/ck_upload/files/gavujobijejisex.pdfIn PDF document text
    • https://carcarnet.com/home/sandbox/domains/hkdance.tritek.hk/public_html/ckfinder/userfiles/files/murafuf.pdfIn PDF document text
    • https://suadienlanhhanoi.net/upload/files/bilemekidelesipufu.pdfIn PDF document text
    • http://hoanggiaphatstone.com/upload/files/zowonapepefodo.pdfIn PDF document text
    • https://haltia.mx/sii/ckfinder/userfiles/files/divugixuwanudazejom.pdfIn PDF document text
    • http://petswithlove.com/cvsprojects/SSK/Source/2.0.0/images/files/14516249044.pdfIn PDF document text
    • http://africareview.in/userfiles/file/39687032145.pdfIn PDF document text
    • http://liavanhaeringen.nl/userfiles/files/16271002116.pdfIn PDF document text
    • https://myhoorayhealth.com/wp-content/plugins/super-forms/uploads/php/files/364ce5e2da85480d14bfb87dbb5898a3/29945687104.pdfIn PDF document text
    • https://bdlvn.com/steel/upload/files/73286676652.pdfIn PDF document text
    • https://rougezenekar.hu/files/file/wegudifotofusezovomu.pdfIn PDF document text
    • http://akcjonariusz.com/UserFiles/file/50186216433.pdfIn PDF document text
    • http://targhevaticane.it/userfiles/files/24795027208.pdfIn PDF document text
    • http://loca-granderoue-montaletang.com/ckfinder/userfiles/files/duvutusekedem.pdfIn PDF document text
    • https://sunriseinnjasper.com/nbloom/fckuploads/file/89426661919.pdfIn PDF document text
    • http://luijkzonwering.nl/image/file/11978516272.pdfIn PDF document text
    • https://nolimitscenter.be/peausitive/images/FCKeditor/file/35062824713.pdfIn PDF document text
    • https://www.casestilistas.es/ckfinder/userfiles/files/62947437693.pdfIn PDF document text
    • http://sushimura1.com/uploads/files/14971308348.pdfIn PDF document text
    • http://bbmeti.it/userfiles/files/43517621548.pdfIn PDF document text
    • https://regalcabs.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1613587beb7788---ruvalelozituj.pdfIn PDF document text
    • http://lanaecoloridabruzzo.it/userfiles/file/45504589733.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/Om9ozkHLxGw/uplcv?utm_term=dora+and+the+lost+city+of+gold+full+movie+downloadPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e17f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE17F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f991.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF991 18220 bytes
SHA-256: 2ed67147736eb857aef42dd03e76d57e1d5a9b7769d58df7068913fe849365f3
font_02_sfnt_off000128e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x128E6 11292 bytes
SHA-256: 7bff381fb3e5fcedfd359f53ad34260156dfe8b22589b850557a3c0774dfd964