Malicious PDF — malware analysis report

Static analysis result for SHA-256 2cc168a98f8e0bbe…

MALICIOUS

PDF

83.6 KB Created: 2021-09-03 19:55:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 9e8457b016529c44b162955bafac1e6b SHA-1: 1dd96e60f7c36eba661ef595aed5d88e253d6c95 SHA-256: 2cc168a98f8e0bbe52e90611b7620fc83e83ade31ba59465125aa7b3abaa9787
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution T1059.007 JavaScript

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It functions as a link farm, presenting numerous URLs, many of which point to compromised WordPress sites or disposable hosting, suggesting a phishing or malware distribution scheme. The presence of external URIs and the nature of the links indicate potential exploitation for client execution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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 http://w-mill.jp/images/file/13275482415.pdf In PDF document text
    • http://socialbomjesus.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/160765997d34af---5833466911.pdfIn PDF document text
    • https://plswa.com/wp-content/plugins/super-forms/uploads/php/files/0c6b1258d0e55678676fe6a3715569be/29952637387.pdfIn PDF document text
    • http://ganan10.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/160c31d5e477cb---babofow.pdfIn PDF document text
    • http://stpatricksreunion.org/clients/84553/File/23408032246.pdfIn PDF document text
    • https://www.hotel-palladium.gr/wp-content/plugins/super-forms/uploads/php/files/ol5slup4tc6hmf9k699oo3fnqo/9303718187.pdfIn PDF document text
    • https://weilaimachinery.com/userfiles/files/26878744169.pdfIn PDF document text
    • https://www.d-table.com/wp-content/plugins/super-forms/uploads/php/files/c2a3755dd79d23ff5975fd86d6624319/39886685602.pdfIn PDF document text
    • http://www.barankayalar.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/16073914d73afb---momijibigetovax.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b1a6698311f---lixikorajemazes.pdfIn PDF document text
    • http://inspirationallabels.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1607ca12526288---silevefojezise.pdfIn PDF document text
    • http://www.x454.com/wp-content/plugins/super-forms/uploads/php/files/pmn400eu2da9ilsch3mh7l9ib1/paxexanoxazuvefos.pdfIn PDF document text
    • http://cravaluos.com/ckfinder/userfiles/files/24711621371.pdfIn PDF document text
    • https://eijo.in/ckfinder/userfiles/files/41886363189.pdfIn PDF document text
    • http://lalitas-thaimassage-spa.de/wp-content/plugins/formcraft/file-upload/server/content/files/160e6cfe19b00e---43902057182.pdfIn PDF document text
    • https://nhanloc.net/userfiles/file/lokifuxobubewabokapovu.pdfIn PDF document text
    • http://evopizza.lt/ckfinder/userfiles/files/61376809198.pdfIn PDF document text
    • http://baovevietnam-vnss.com/upload/file/99953222355.pdfIn PDF document text
    • https://perleyparish.org/wp-content/plugins/super-forms/uploads/php/files/23a71d0f09a9893b63b99b366e5ed473/52588378455.pdfIn PDF document text
    • https://hotelindigha.com/FCKeditor/file/jidiwafajekezon.pdfIn PDF document text
    • http://erfolgsapp.de/wp-content/plugins/formcraft/file-upload/server/content/files/16084722fcad60---wufudaneresifogomovavop.pdfIn PDF document text
    • http://anadolumatbaa42.com/genelresimler/file/fixizakamuxurigokelaxutur.pdfIn PDF document text
    • https://efnnma.org/files/file/15577677499.pdfIn PDF document text
    • https://aftaplan.com/works/peepsparty/html/upload_files/file/tusizegaxebege.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/fzgW7-mxBc0/uplcv?utm_term=chordate+embryology+pdf+free+downloadPDF 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_off0000e18c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE18C 17732 bytes
SHA-256: ab14a73a87df023b446a20c80e07716808924fd51cdc53c78b1eddf7240b8b64
font_01_sfnt_off00010f3c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F3C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012753.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12753 11056 bytes
SHA-256: f51983439d4e8c59908e4bd92923139287cdb27d928440f1e10bd2b18db27ed5

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