Malicious PDF — malware analysis report

Static analysis result for SHA-256 c0101eaab50aef43…

MALICIOUS

PDF

85.0 KB Created: 2021-09-21 17:58:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 007ddce7f983ba5a779aa5a7e3fc2abc SHA-1: 8731ec8e98e2a585ecd0e053af4cba9bea540cd3 SHA-256: c0101eaab50aef437cb0fcefd898f4616831729a3b4a352fea9609885471b3c2
156 Risk Score

Malware Insights

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

This PDF file was flagged by ClamAV as a phishing trojan and by an ML classifier with high confidence. It contains numerous links, many pointing to compromised WordPress sites and disposable hosting, suggesting it functions as a link farm. The primary purpose appears to be directing users to malicious content or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9912

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
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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://charming-dc.com/uploads/files/202109150617315281.pdf In PDF document text
    • http://www.siposferenc.hu/html/40169768241.pdfIn PDF document text
    • https://plumcourse.com/wp-content/plugins/super-forms/uploads/php/files/b501242322c5d48425bb8d302ba7e388/xikikun.pdfIn PDF document text
    • http://rc-mst.com/mst/_upload/files/dekelu.pdfIn PDF document text
    • https://www.lang-mayer.de/wp-content/plugins/formcraft/file-upload/server/content/files/16142c396e5516---96505624507.pdfIn PDF document text
    • http://szamosiszerviz.hu/feltoltott/files/49986045614.pdfIn PDF document text
    • https://aljazeerahdrilling.com/userfiles/files/66162453085.pdfIn PDF document text
    • http://onlinepravenconsultant.com/uploads/wysiwyg/files/segabelelorusekofoloroke.pdfIn PDF document text
    • http://xn--80akij1ajew.xn--p1ai/wp-content/plugins/formcraft/file-upload/server/content/files/1613329527488b---66244208801.pdfIn PDF document text
    • https://tese.in/ckfinder/userfiles/files/23042405908.pdfIn PDF document text
    • https://maconlux.lu/userfiles/files/61168549485.pdfIn PDF document text
    • https://shidoremicrosys.com/media/17438112289.pdfIn PDF document text
    • http://mofrantech.com/userfiles/file/zinawafinebapit.pdfIn PDF document text
    • http://stphilomenaonline.org/userfiles/file/benedebumevelam.pdfIn PDF document text
    • http://allineers.netlovestories.com/upload/files/46893528596.pdfIn PDF document text
    • https://biblioteka-koneck.pl/ckfinder/userfiles/files/55368572162.pdfIn PDF document text
    • https://lexcyberia.com/userfiles/files/52800755877.pdfIn PDF document text
    • https://darshanam.com/ckfinder/userfiles/files/tijidilem.pdfIn PDF document text
    • http://mountmedpharmacy.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16143bdfc94a84---62399199492.pdfIn PDF document text
    • http://raduzhniy.com/wp-content/plugins/formcraft/file-upload/server/content/files/16136620f82b26---64995922850.pdfIn PDF document text
    • https://ohligschlaeger-berger.de/wp-content/plugins/formcraft/file-upload/server/content/files/16140632bc5497---82470439297.pdfIn PDF document text
    • https://www.ferienhof-schneider.de/wp-content/plugins/formcraft/file-upload/server/content/files/1613bc46f2004d---30930892864.pdfIn PDF document text
    • https://www.mclarenpress.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613deae3b4905---gukuxad.pdfIn PDF document text
    • http://rent2day.ca/ci2/userfiles/files/4152804429.pdfIn PDF document text
    • https://landatur.com/files/galeria/files/garewusoxigilozakizur.pdfIn PDF document text
    • http://hk-bbc.com/upload/file/67301206516.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/zMnd8XtcwSM/uplcv?utm_term=android+dashboard+design+templatesPDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • 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_off0000e425.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE425 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000fc37.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC37 18852 bytes
SHA-256: 2c5bf209f2a5aafe0d8cd0f4fc2aaa13f9802ccde0bea7ed2efd44881181dd2d
font_02_sfnt_off00012d2d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12D2D 10960 bytes
SHA-256: 4888899e55b8d95b5a35344efa8b0951f117d7a9727e01ef2a152f3672a65191

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