Malicious PDF — malware analysis report

Static analysis result for SHA-256 f8bbc1468ead7fa6…

MALICIOUS

PDF

92.6 KB Created: 2021-06-13 10:07:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 9bdb83a0362c1269fc22ea3cf847d6fd SHA-1: 39c0c7e125f67283e5946c411cea7fb89b56a200 SHA-256: f8bbc1468ead7fa68b6a597e4961017d760e9283af9e72306f4ab40960c1a8a2
156 Risk Score

Malware Insights

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

This PDF document was flagged by multiple heuristics and ClamAV as malicious, specifically as a phishing or trojan delivery mechanism. It contains a link farm pointing to numerous compromised websites, many of which host PDF files via vulnerable WordPress plugins. The embedded URLs suggest an attempt to trick users into downloading malicious content, potentially related to the 'Davido new album' lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://philabc.ru/uplcv?utm_term=davido+new+album+a+better+time+download PDF link annotation
    • https://jiptv.nl/wp-content/plugins/super-forms/uploads/php/files/hhckjhtv19bmdkf66g6o9mindp/51482601649.pdfIn PDF document text
    • https://www.thecandystoresudbury.com/wp-content/plugins/super-forms/uploads/php/files/51hfuadtcghud2scsulo6sufn0/ludezugitawinejijesod.pdfIn PDF document text
    • http://ngpsusa.com/wp-content/plugins/super-forms/uploads/php/files/18klaag6k1f25uhbm7fndofkns/39888088540.pdfIn PDF document text
    • https://liniagdanskzydowo.pl/files/famesim.pdfIn PDF document text
    • https://bringem.de/wp-content/plugins/super-forms/uploads/php/files/cb806f90f32f16ca958f32de55b2cf63/nevejigesisobupufu.pdfIn PDF document text
    • http://imailbox.nl/images/uploadedimages/file/junamefumawuxagepif.pdfIn PDF document text
    • http://www.commandinglife.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bfc2d2465c1---86864091921.pdfIn PDF document text
    • https://www.americanapi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607765fab2ba1---16608902146.pdfIn PDF document text
    • http://milcontabil.com.br/wp-content/plugins/super-forms/uploads/php/files/qqi9o752k8lnlkje040da1hfo2/bopolomanusujogedikivegi.pdfIn PDF document text
    • http://www.iycadana.org/wp-content/plugins/super-forms/uploads/php/files/2prnelfh5t8ngdpbk2gvf1pcf6/levimemosafuvikiwu.pdfIn PDF document text
    • http://diysmart.net/userfiles/file/34833701569.pdfIn PDF document text
    • https://oddluzanie.net/userfiles/file/13587503233.pdfIn PDF document text
    • https://mariellatriolo.it/public/file/vovadanarupon.pdfIn PDF document text
    • https://jjmassociates.com/wp-content/plugins/super-forms/uploads/php/files/848b065f4a48e46f4f4b6acb7791b62a/46552508324.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • 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_off00012e1c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12E1C 5084 bytes
SHA-256: 9570e7ffab9e3a83ecf50dbb22bc39b4743925ee2285f3e6851c0a06b99ea60f
font_01_sfnt_off00013f68.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13F68 11396 bytes
SHA-256: 8facd6be83878a877eb7958bf9773f26fb6bf59ea1b6a1a1f0d7cfbcead32dfb

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