Malicious PDF — malware analysis report

Static analysis result for SHA-256 6abc2cd7074e1373…

MALICIOUS

PDF

77.2 KB Created: 2021-03-20 19:45:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 139db8db8350a62b8abb0dabe4bd36d7 SHA-1: 9371f1b38e2c9746d69df7a22128c7cd5f75cf43 SHA-256: 6abc2cd7074e1373f4b71418d1d36465db294e916e716a7d7e97a5675bbd0c6f
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, with one heuristic specifically identifying a 'PDF_SEO_LINK_FARM'. The primary external URI points to 'jumiwimov.ru', which is likely part of a phishing or SEO poisoning scheme. While no scripts were explicitly extracted, the PDF structure and the presence of external links suggest an attempt to redirect the user to a malicious site, potentially for further exploitation or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://jumiwimov.ru/award?keyword=adding+and+subtracting+rational+expressions+with+like+denominators+worksheet+pdf PDF link annotation
    • http://dipewafotowagu.22web.org/modeguloke.pdfIn PDF document text
    • http://jiramowujunobo.22web.org/jaboxuvufegifu.pdfIn PDF document text
    • https://nonibebufixaz.weebly.com/uploads/1/3/2/6/132682934/kunefepabisofa-fafado-biziwiridaselem-pemex.pdfIn PDF document text
    • https://sowematawenuw.weebly.com/uploads/1/3/1/1/131164153/wegal_runafusarakipix_larevoma_nomawep.pdfIn PDF document text
    • https://negapisege.weebly.com/uploads/1/3/4/6/134635707/fefapitozej_fevutuvuxo_mowozojo_xuvovabudi.pdfIn PDF document text
    • https://faxomozux.weebly.com/uploads/1/3/0/7/130775398/lesepomojigupuz.pdfIn PDF document text
    • http://nebetejetagume.iblogger.org/nefobowolaxitonij.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/238205fb-678a-45b7-949f-d9c29b9037f3/41275055511.pdfIn PDF document text
    • https://s3.amazonaws.com/purufiz/focusrite_control_user_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/vofadoloves/12662235211.pdfIn PDF document text
    • http://zefefudu.rf.gd/xabemiwalixenomuruwulo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/48eb82f7-1991-42a6-a344-5e550478d78c/57614392741.pdfIn PDF document text
    • https://s3.amazonaws.com/lezopobigeza/dead_milkmen_discography.pdfIn PDF document text
    • https://s3.amazonaws.com/jefobexapulow/faber_castell_malaysia_annual_report.pdfIn PDF document text
    • https://s3.amazonaws.com/kefodek/canon_eos_80d_user_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/xulepiwa/20025793324.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dc294f79-3265-492a-8e77-a9bf972224d4/bosch_vision_300_series_washer_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e309d092-493f-4941-ac16-ee19cea8cf6e/42603917615.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6c674109-b493-4ac9-acd0-fbf2efb10072/canon_camera_powershot_sx20is_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/542950f4-52ff-417d-bb51-5b53a730e2c7/65548203820.pdfIn PDF document text
    • https://s3.amazonaws.com/remavuj/notebook_paper_template_word.pdfIn PDF document text
    • https://s3.amazonaws.com/toniseligiwuzux/kenmore_35_pint_dehumidifier_recall.pdfIn PDF document text
    • http://tipesajiwe.epizy.com/3232495984.pdfIn PDF document text
    • https://s3.amazonaws.com/gorajikunobixi/belugagipepoma.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9e405c6f-d6b4-4dda-80dd-db8793790b63/3852644058.pdfIn PDF document text
    • https://s3.amazonaws.com/sugowubuf/64708336208.pdfIn 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_off0000ee3e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE3E 5920 bytes
SHA-256: 4b98821c7d812d62ff26812f66f06398dc5546d0a65031f7a6f1cbfe6f24950c
font_01_sfnt_off00010253.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10253 10300 bytes
SHA-256: 3f942ad5e8939c6a163c37ae87c35f899c5f8ce4acaa55bae4e63532ef24a1c8

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