Malicious PDF — malware analysis report

Static analysis result for SHA-256 7c7cb7c33cd591cc…

MALICIOUS

PDF

62.5 KB Created: 2021-09-15 17:47:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-02
MD5: 50e826993fe82f9aaf57b7448ce0bd89 SHA-1: 7c74ef586a6f9ce8c43794d014a3cfe9649dcbb2 SHA-256: 7c7cb7c33cd591cc4e1bb771fe53a789ec1927416ca29df9bb906503436b515c
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was identified as malicious by ML classifiers and ClamAV, specifically flagged as a phishing trojan. It functions as a link farm, containing numerous URLs pointing to potentially compromised websites and disposable hosting. The primary purpose appears to be directing users to external resources, likely for phishing or malware distribution, leveraging a link farm technique.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7193

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 http://narzedziascierne.eu/Upload/file/vimub.pdf In PDF document text
    • http://makaifruits.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613f8daae67b0---43251686910.pdfIn PDF document text
    • http://obrienbuilders.com/userfiles/file/xakora.pdfIn PDF document text
    • http://ezclasssites.com/var/wwww/dev-ezclasssites-com/data/files/63921476429.pdfIn PDF document text
    • http://vectorma.ru/uploads/assets/file/ralifi.pdfIn PDF document text
    • http://quangphong.vn/uploads/image/files/99629729451.pdfIn PDF document text
    • http://www.training4thefuture.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/161366f62e02b8---87735788389.pdfIn PDF document text
    • http://www.sctiec.com/up_files/FCK/file/ripejikevofo.pdfIn PDF document text
    • http://dennehylaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/xitixijudasiluxevixivoli.pdfIn PDF document text
    • https://www.nobleorthodontic.com/wp-content/plugins/super-forms/uploads/php/files/c533471e8504232d3868bd6bb5a9d986/14328804020.pdfIn PDF document text
    • https://www.sblending.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16139050a936c4---karofilafalelolirozijupun.pdfIn PDF document text
    • http://www.risingstars.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1613809725da1c---7111724762.pdfIn PDF document text
    • http://jar-ted.pl/file/25689316084.pdfIn PDF document text
    • http://www.kidnuri.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612ef03b22dfb---71255086943.pdfIn PDF document text
    • https://wscnaturalhealings.com/wp-content/plugins/super-forms/uploads/php/files/848c5dbc1d4f002210450a88b12c46b6/tiselan.pdfIn PDF document text
    • https://lochoanggia.com/upload/files/37076468250.pdfIn PDF document text
    • http://eros-arena.de/eros/userfiles/file/75779060727.pdfIn PDF document text
    • http://labonscafe.com/userfiles/59492733298.pdfIn PDF document text
    • https://indobaliart.com/sitefiles/file/xaxolaboziju.pdfIn PDF document text
    • https://wedding-photos.cz/userfiles/file/99599694165.pdfIn PDF document text
    • http://tekizolasyon.com/ckfinder/userfiles/files/19557326670.pdfIn PDF document text
    • http://www.goldenlantern.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/161417225b8574---subime.pdfIn PDF document text
    • http://bsinteriordesigner.com/userfiles/files/lubiwemulutikajefofojig.pdfIn PDF document text
    • http://ilonew.tasksplan.com/ckfinder/userfiles/files/73313316363.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BvfzZFkJO3s/uplcv?utm_term=angry+birds+seasons+2.2+0+apkPDF 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_off0000c4d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC4D6 19284 bytes
SHA-256: e9bebe158d75df9c0b78559353998f4e3d8c799e93cd5d7f857cd7b1b238b5f6

Open this report in the interactive analyzer, or submit your own file for analysis.