Malicious PDF — malware analysis report

Static analysis result for SHA-256 1a2856bbaaebcbde…

MALICIOUS

PDF

73.9 KB Created: 2021-06-20 06:55:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: d13958bf19aa8b9a3a3da71f2e9c2df6 SHA-1: 78ee035e78e4ba6aa539dba55e0287c3a68aec19 SHA-256: 1a2856bbaaebcbdecab657e69ecfaf30182ad50e15c5619dba1cf6b8f4a2a5b5
156 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by a machine learning classifier and ClamAV, indicating a high likelihood of malicious intent. It functions as a link farm, directing users to various compromised WordPress upload directories and disposable domains, disguised with a lure related to 'boboiboy movie 2 video'. The presence of multiple external URIs and link farms suggests an attempt to redirect users to phishing or malware distribution sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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://ivanamihic.com//files/bufitorufa.pdf In PDF document text
    • https://maydongy.com/wp-content/plugins/super-forms/uploads/php/files/p5grh5rafi1d86gcdvl9hkh7ok/joxuzakituzezamuguvanot.pdfIn PDF document text
    • https://xlspandoek.nl/userfiles/file/vizuvipi.pdfIn PDF document text
    • http://choinka4x4.org/cms/files/file/monimugi.pdfIn PDF document text
    • http://brandnewgoods.net/userfiles/file/belobezogebenibozikedupe.pdfIn PDF document text
    • https://theshairpodcast.com/wp-content/plugins/super-forms/uploads/php/files/8d0e1fcb11fd2fb5e344a607fe96e4a3/24525321609.pdfIn PDF document text
    • http://aite-materials.com/upfiles/file/razemugameraxose.pdfIn PDF document text
    • http://hcvitamin.com/webroot/img/files/62931074502.pdfIn PDF document text
    • http://www.studiolegalefusimorelli.com/wp-content/plugins/formcraft/file-upload/server/content/files/16076d853b7e9b---28438247525.pdfIn PDF document text
    • http://www.next-conseil.fr/wp-content/plugins/formcraft/file-upload/server/content/files/16097a0bc11aea---33716783743.pdfIn PDF document text
    • https://agrachoff.ru/wp-content/plugins/super-forms/uploads/php/files/80d46e8cdc014a0006412eb0435344a5/71618318097.pdfIn PDF document text
    • http://www.festivalmarrakech.info/wp-content/plugins/formcraft/file-upload/server/content/files/160bee755d6234---joralo.pdfIn PDF document text
    • https://realwebguys.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bc2a983c937---ruvufegula.pdfIn PDF document text
    • https://g-ortho.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160719c0b7be36---84841573167.pdfIn PDF document text
    • https://xn--80aaaglcftt5alesfkk7f.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/085b5506aa0ea734a07203398e45da51/64703426089.pdfIn PDF document text
    • https://www.harasportcenter.com/wp-content/plugins/super-forms/uploads/php/files/7u9n3u12mh0vcrg3hfgubv0022/32416303618.pdfIn PDF document text
    • https://clubelsendero.com/img_pag/file/vopoluxexojakoxekuxelox.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1xuhb7AK25c/uplcv?utm_term=boboiboy+movie+2+videoPDF 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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e2ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2EA 4940 bytes
SHA-256: 5dcbf1ea27471d96c581e36cc5717ab517772c36a74fd0370b6348bf0ef87116
font_01_sfnt_off0000f3b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3B6 11228 bytes
SHA-256: 372c4db9cba63beaaff00c84a08d627e0da37b48daff4e20754332d0dc5070dd