Malicious PDF — malware analysis report

Static analysis result for SHA-256 2f2c2ad50ff0a38a…

MALICIOUS

PDF

75.4 KB Created: 2021-09-12 23:22:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 5e9d552dbb9f38c44442f2489efcee5f SHA-1: 45bdabc9ed517c95434628c63264665e59bc8c4c SHA-256: 2f2c2ad50ff0a38a0d97c644bb38b963c7e28f13e10f51590e69a9e6a93e1e24
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was flagged as malicious by ML classifiers and ClamAV. It contains numerous links, many hosted on disposable domains or compromised CMS upload storage, suggesting a link farm designed to redirect users to malicious content. The presence of multiple external URIs and link farm heuristics indicates a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9963

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://sampoernastrategic.com/uploads/image/files/12530596999.pdf In PDF document text
    • https://hamzsabegi60szallo.hu/UserFiles/File/6675834671.pdfIn PDF document text
    • http://kingspec.su/wp-content/plugins/super-forms/uploads/php/files/os3okhjhp7mmibjccb5h66n5rr/kokuwusazosozudoxud.pdfIn PDF document text
    • http://www.sname.org.tw/sname/ckfinder/userfiles/files/simozilakipopikideg.pdfIn PDF document text
    • https://hankilfood.com/userfiles/file/20210906223520.pdfIn PDF document text
    • http://lorichphoto.com/pictures/file/vebiguwipuxaxexinosat.pdfIn PDF document text
    • https://machnhaduong.com/images/uploads/files/98511220768.pdfIn PDF document text
    • https://cursosadistanciayonline.com/medios/files/finuxedepetatijeg.pdfIn PDF document text
    • http://bernardthevenet.fr/ckfinder/userfiles/files/malotusagabivewalip.pdfIn PDF document text
    • http://vetusmeter.com/images/upload/File/19359334445.pdfIn PDF document text
    • https://dansobentre.net/uploads/file/98804037617.pdfIn PDF document text
    • http://www.adanakursmerkezi.com/wp-content/plugins/formcraft/file-upload/server/content/files/161347e00be7f7---5227456460.pdfIn PDF document text
    • http://chieucoingason.vn/files/93494281014.pdfIn PDF document text
    • http://pietrek.com/MARCUS/files/file/papumubuxagelati.pdfIn PDF document text
    • https://globalcareerclub.com/FCKeditor/userfiles/file/rololek.pdfIn PDF document text
    • http://abwingsmd.com/uploads/files/19356179089.pdfIn PDF document text
    • http://gemaeldeundobjekte.de/uploads/files/47540081870.pdfIn PDF document text
    • http://arcadia-fitness.es/userfiles/file/3759793977.pdfIn PDF document text
    • https://skyfireconsulting.com/wp-content/plugins/super-forms/uploads/php/files/v2d4d5r2t5go9l8j1q2f0d1n6e/68592424258.pdfIn PDF document text
    • https://mudraconsultancy.com/uploads/files/6223445750.pdfIn PDF document text
    • http://www.enjoyvaltellina.it/admin/ckfinder/userfiles/files/nukoripupolekugejafolu.pdfIn PDF document text
    • https://darkoyunpin.com/calisma2/files/uploads/15292685341.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/DOqCt-cVA4I/uplcv?utm_term=ubah+pdf+ke+powerpoint+onlinePDF 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_off0000c289.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC289 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000daa0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDAA0 10752 bytes
SHA-256: b143e48d67b0c292796cb47fe74e48524623927f2bd312c79a510f80750cd35f
font_02_sfnt_off0000f314.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF314 17492 bytes
SHA-256: ac259f83ed354f5906ddf1fe87534b453eac11ab3da93c4ae4d3d82fdbf206ef