Malicious PDF — malware analysis report

Static analysis result for SHA-256 3b0e07cd71086902…

MALICIOUS

PDF

65.4 KB Created: 2021-09-04 08:03:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 1328190b1e811d77244eff466b0ce784 SHA-1: 4fe6e8713c2c968661d76a68d79286c24c98d7d3 SHA-256: 3b0e07cd710869028ff39a25b739fb4887e21fe68c8d50a435d8c499bc72f375
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains a large number of external links, many of which point to compromised websites or disposable hosting, indicating a link farm designed for malicious redirection. The ClamAV detection and ML classifier further support its malicious nature. While no scripts were explicitly extracted, the structure and heuristics suggest it's intended to lure users to malicious sites, likely as a phishing or malware distribution vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8344

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://klawiatury-foliowe.pl/_data/file/wabisipoluvazatusowefep.pdf In PDF document text
    • http://xn--vb0b83rba554gca.kr/page_data/file/20210514183030.pdfIn PDF document text
    • https://arbormaster.net/uploads/files/22104897897.pdfIn PDF document text
    • http://xn--j1aai7d.xn--p1ai/userfiles/file/bupokepukizutiwi.pdfIn PDF document text
    • https://www.finestkindcharter.com/wp-content/plugins/formcraft/file-upload/server/content/files/16092053038c7e---dajoxuwubiravebozonum.pdfIn PDF document text
    • http://grupogmec.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c76f10a56d2---dovidaf.pdfIn PDF document text
    • https://fnb-concepts.com/images/uploads/files/wujafikija.pdfIn PDF document text
    • https://airflow-skateboards.com/userfiles/files/lakebigigonum.pdfIn PDF document text
    • http://goteneplast.se/files/images/file/jubuxoxojupuwadariw.pdfIn PDF document text
    • http://mijneigenlift.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160726456a15d6---gelufesudelasipamiziru.pdfIn PDF document text
    • https://www.numberoneporthill.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1607e148c00a63---17624715536.pdfIn PDF document text
    • https://nuevocoach.co.uk/wp-content/plugins/super-forms/uploads/php/files/0a0a29827d78b6a9ccc7f63d8be56a27/91790465651.pdfIn PDF document text
    • http://stadtbild-intervention.de/Quansis/ckfinder/userfiles/files/86264819231.pdfIn PDF document text
    • http://numere-mopede.ro/mm/file/sesolagil.pdfIn PDF document text
    • http://dirpub.org/editor/ckfinder/userfiles/files/lutururexugukoputuf.pdfIn PDF document text
    • https://visaonline-vn.com/wp-content/plugins/super-forms/uploads/php/files/saslrgnleddcttsgd9anl8sfro/suwematemaxub.pdfIn PDF document text
    • https://www.popcaffe.it/wp-content/plugins/super-forms/uploads/php/files/ad8c8213543c398827b5e648d6a5d8f4/34804393186.pdfIn PDF document text
    • https://mtestbd.com/assets/uploads/files/viraxinigudajogatix.pdfIn PDF document text
    • https://esteticarcare.com/wp-content/plugins/super-forms/uploads/php/files/b8fdf9bb84377f9a711e8be94da01cdb/10186541014.pdfIn PDF document text
    • http://gorisum.net/fckeditor/upload_file/file/fuwedowumupi.pdfIn PDF document text
    • http://hesexpo.com/img/editor/image/file/kukiwekuluzotegifudoka.pdfIn PDF document text
    • http://iuoooo.com/filespath/files/20210814070558.pdfIn PDF document text
    • http://iberia-ex.com/images/blog//file/vejewagizimakip.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/fzgW7-mxBc0/uplcv?utm_term=supplier+performance+evaluation+criteria+pdfPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ce2b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE2B 10856 bytes
SHA-256: bcdcd94b701545722a59f548a97b7e5ce1bd61250cd7b713bfc2b3ff3bb50df1

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