Malicious PDF — malware analysis report

Static analysis result for SHA-256 60fcfbffd0d1d6ae…

MALICIOUS

PDF

102.4 KB Created: 2021-09-05 02:13:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: b8dae200e002d5c6dba88056bb4bb395 SHA-1: 7f2613bf9d4e23528970d3b610ffd46e8078ac77 SHA-256: 60fcfbffd0d1d6ae4ca53582909ab3462b4937ac51150c6b35ef79b533b6fba4
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains a link farm pointing to numerous URLs, many hosted on compromised WordPress sites or disposable domains, which likely serve as download locations for further malicious content. The presence of embedded URLs and the nature of the heuristics suggest an attempt to trick users into downloading malicious files, potentially via a spearphishing attachment vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9790

Heuristics 6

  • 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
  • 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://tribo.kz/userfiles/File/ropasozab.pdf In PDF document text
    • http://baloneacessorios.com/_upload/file///99443176064.pdfIn PDF document text
    • https://goldenparadisestsimons.com/wp-content/plugins/super-forms/uploads/php/files/3d5f117d410fcc6f7242b21bf0e53538/85077578195.pdfIn PDF document text
    • http://cn-junsheng.com/upload/file///20216287998579.pdfIn PDF document text
    • https://www.ideaklinikkadikoy.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b07b8c2879---xusovujozopamevixakited.pdfIn PDF document text
    • http://kibbkw.com/uploads/file/keriledo.pdfIn PDF document text
    • https://torgradio.ru/new/files/file/tegerepanuxel.pdfIn PDF document text
    • http://stainless-faucet.com/uploads/htmlupload/files/paxezusewodatadewitenu.pdfIn PDF document text
    • https://cffcommunications.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1/1607bd02e8273b---16033936397.pdfIn PDF document text
    • http://thehawthornnyc.com/wp-content/plugins/formcraft/file-upload/server/content/files/160831d403b737---17245445473.pdfIn PDF document text
    • http://rivucota.com/upload/files/nutaxan.pdfIn PDF document text
    • http://hnkingdee.cn/Files/file/202152422349.pdfIn PDF document text
    • http://ayurveda-shiatsu-qigong-nice.com/upload/files/97314664080.pdfIn PDF document text
    • https://masterjobintl.com/ckfinder/userfiles/files/35339922175.pdfIn PDF document text
    • https://www.gsccn.it/wp-content/plugins/formcraft/file-upload/server/content/files/160a43fcfe8fd4---tifonozenojateroju.pdfIn PDF document text
    • http://arabstina.com/ckfinder/userfiles/files/58104640291.pdfIn PDF document text
    • http://asupuro.com/user_data/image//file/voxivefiwilukigajuxifito.pdfIn PDF document text
    • http://ventilatoryzlin.cz/images/file/jagetosoza.pdfIn PDF document text
    • http://omonetach.pl/foto/ilustracje/file/disufuweworapanusowogenew.pdfIn PDF document text
    • https://completecollegestrategies.com/wp-content/plugins/super-forms/uploads/php/files/7df11b1ccb018f8b2196195a5ca06d0e/38312586001.pdfIn PDF document text
    • https://asiahealthcaredentalcentre.com/ckfinder/userfiles/files/28130100358.pdfIn PDF document text
    • https://brunoamaranti.it/wp-content/plugins/super-forms/uploads/php/files/0kssvau01k45b309cs94mc5ve6/firepal.pdfIn PDF document text
    • http://marinapogon.pl/upload/file/xevubukuvowepozolis.pdfIn PDF document text
    • http://for-rent-leuven.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d061457831---pomero.pdfIn PDF document text
    • http://kstarsmall.net/userfiles/file///30064336091.pdfIn PDF document text
    • http://jainfarms.com/uploads/27139171975.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1xuhb7AK25c/uplcv?utm_term=bank+po+syllabus+2018+pdf+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_off000120db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x120DB 21532 bytes
SHA-256: 0c01e2f74980fcf0c81ce7672093207065991649fe79ba3e959f37fe7511f830
font_01_sfnt_off000159c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x159C9 11156 bytes
SHA-256: 888a8cfb6f00321b60252f6b6b60d98b88522420ac1d9de4375d53cd7a542aa2
font_02_sfnt_off000173f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x173F4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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