Malicious PDF — malware analysis report

Static analysis result for SHA-256 47e5e11f2d28f927…

MALICIOUS

PDF

67.8 KB Created: 2021-09-06 01:09:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 691093548614fd1bbae36ac3d3149e7a SHA-1: 084e3b81e611282a6d21a76f3a52061785bcd949 SHA-256: 47e5e11f2d28f92708e5519c0b293d4de00580a1dd9d8efe05319dd2d1211765
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a phishing or trojan threat. It functions as a link farm, containing numerous URLs pointing to compromised CMS uploads and disposable hosting, likely to distribute further malicious content or phish users. The presence of multiple external URIs and a link farm structure suggests an attempt to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6614

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 https://kontiko.com/ktkweb3/images/upload/files/19501298288.pdf In PDF document text
    • https://eternalbliss.net/file/16168600422.pdfIn PDF document text
    • https://www.audioclinica.pt/wp-content/plugins/super-forms/uploads/php/files/ab1g3n47llai8op75oldua7q95/56163361274.pdfIn PDF document text
    • https://singlespeed-switzerland.ch/userfiles/files/16270867267.pdfIn PDF document text
    • http://doktor-okonski.pl/uploadimg/file/sirudodubozuponolokuw.pdfIn PDF document text
    • http://muzeumostrowiec.pl/obrazy/file/2855229633.pdfIn PDF document text
    • https://indacphuc.com/wp-content/plugins/super-forms/uploads/php/files/u5jhcvd3dl9e7d00prc0v7ijt2/maludu.pdfIn PDF document text
    • http://cafegreenwichvillage.com/uploads/files/67303162470.pdfIn PDF document text
    • http://elijasprojekts.lv/files/file/88191716447.pdfIn PDF document text
    • http://gildiamasterov.ru/userfiles/file/75981741462.pdfIn PDF document text
    • http://finsura-lifedirect.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1607b74589e4b7---xakuzaluzoguzovidupebipem.pdfIn PDF document text
    • https://bookatowncar.com/userfiles/file/wokij.pdfIn PDF document text
    • http://dochoiotovn.com/uploads/userfiles/file/fubevekuvima.pdfIn PDF document text
    • https://www.m2asolutions.com/wp-content/plugins/super-forms/uploads/php/files/6e3528899c87434b85bc146c3623d406/34057019838.pdfIn PDF document text
    • http://glina-master.ru/admin/ckfinder/userfiles/files/nogeges.pdfIn PDF document text
    • https://totalyoumovement.com/wp-content/plugins/formcraft/file-upload/server/content/files/16079ea5f6aa39---47260306679.pdfIn PDF document text
    • http://erbilsunhotel.com/wp-content/plugins/super-forms/uploads/php/files/dq11k7k0fiq2ks8v9gai4mvoe3/15705324508.pdfIn PDF document text
    • https://www.lindopoint.it/wp-content/plugins/super-forms/uploads/php/files/6bf989b46389b8e8af8694c700411db8/xotolarumizap.pdfIn PDF document text
    • https://egokituz.org/files/galeria/files/kavexubixetu.pdfIn PDF document text
    • https://footballsod.com/images/ck-uploads/files/8036248246.pdfIn PDF document text
    • https://motionslam.com/wp-content/plugins/super-forms/uploads/php/files/d477ff767c33894cf7833ba106db0eb5/94829399712.pdfIn PDF document text
    • https://webhostmurah.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607af8ee4e7e9---81089087691.pdfIn PDF document text
    • https://sitebyside.ru/wp-content/plugins/super-forms/uploads/php/files/1250804648db8534f601ced755211e39/mulak.pdfIn PDF document text
    • http://brmhn.com/userfiles/file/20210525064801_a4tz00.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/Om9ozkHLxGw/uplcv?utm_term=clarence+larkin+charts+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_off0000e33a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE33A 17856 bytes
SHA-256: 94749687ad378948f60291e1f9ea44a3b6b855064561711fb8ca9405adc7fbdb