Malicious PDF — malware analysis report

Static analysis result for SHA-256 242c1c99e69cbb96…

MALICIOUS

PDF

97.7 KB Created: 2021-09-20 00:56:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: f14e5dcd990a39bf325e197eaa1a4476 SHA-1: c7a168962e40e913ca25139c6ad5995944859604 SHA-256: 242c1c99e69cbb9629fbe48d2d6c598d92389d3cd8e114d66e57619d4fcb1a51
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, with the heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicating a high number of distinct hosts and a link farm structure. This suggests the document's primary purpose is to redirect users to potentially malicious websites. While no scripts were explicitly extracted, the PDF structure and URL patterns are indicative of phishing or malware distribution campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9961

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
  • 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://ego-sofa.tw/uploads/files/202109160622076092.pdf In PDF document text
    • http://onlinetradeshow.ir/uploads/files/81137810184.pdfIn PDF document text
    • https://dalilak1.com/userfiles/file/kaxamanivegebaxufawo.pdfIn PDF document text
    • http://xn--80aantfcaehjbxzf1m.xn--p1ai/userfiles/file/85690654829.pdfIn PDF document text
    • http://cabanagarden.hu/editor_up/40025842858.pdfIn PDF document text
    • https://www.hediyevideo.com/wp-content/plugins/formcraft/file-upload/server/content/files/16137376cadb19---gozusuzukijirufabi.pdfIn PDF document text
    • http://drapikowski.pl/uploaded/fck_files/file/96728830434.pdfIn PDF document text
    • http://erh-hu.com/userfiles/file/dijigedakerej.pdfIn PDF document text
    • http://dialog-seversk.ru/jsplugins/ckfinder/userfiles/files/56605620731.pdfIn PDF document text
    • https://geniodelweb.com/file/javopasegeziwunugunoper.pdfIn PDF document text
    • http://hondatayho.vn/images/ckeditor/files/47327177937.pdfIn PDF document text
    • https://arslanemlak.com/E/file/In PDF document text
    • http://primethailand.com/ckfinder/userfiles/files/ganamibumerav.pdfIn PDF document text
    • https://vivekanandbawwa.com/userfiles/file/90060991720.pdfIn PDF document text
    • https://golf-tout-terrain.com/publish/page/file/18570276222.pdfIn PDF document text
    • http://ifaistos.reality.gr/~triantaf/images/file/90660373168.pdfIn PDF document text
    • https://alident.centralcms.cloud/galeria/files/45660177626.pdfIn PDF document text
    • https://freshchannels.com/home/sites/freshchannels/public_html/ckfinder/userfiles/files/90133435064.pdfIn PDF document text
    • http://inggeo.eu/userfiles/files/nedugujuzedogiwefiju.pdfIn PDF document text
    • https://wct.goldcrownresort.com/magazine_files/files/kararaduzofalusesedi.pdfIn PDF document text
    • http://cachnhietcacham.vn/Images_upload/files/8019516442.pdfIn PDF document text
    • http://lichnyiybrand.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1613abafe4708f---6334279082.pdfIn PDF document text
    • http://zetrade.cz/userfiles/file/lodudaropupilo.pdfIn PDF document text
    • http://www.stadion-zarya.ru/ckfinder/userfiles/files/86642866943.pdfIn PDF document text
    • https://xeroxexpres.cz/userfiles/file/47008826148.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/YTWXjIUwRh0/uplcv?utm_term=fifty+shades+freed+full+movie+watch+online+123moviesPDF 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_off00010ee4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10EE4 20716 bytes
SHA-256: 9dbcb069b7c158a02a5c160a700a47c798f3b661ce2fa736539ad1e47b7b6081
font_01_sfnt_off0001457d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1457D 11428 bytes
SHA-256: 64d812341dc250bd5fe79ae0b23b4151e2fb08ad95d0ece02440802cfc16ab2e
font_02_sfnt_off00016079.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16079 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1