Malicious PDF — malware analysis report

Static analysis result for SHA-256 5fc4056911048328…

MALICIOUS

PDF

78.2 KB Created: 2021-03-11 07:32:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: ec292ddc1e2bd79c834020f61bd8ccdb SHA-1: fa0867feae430486bd07590e33bb823a8f1ccb85 SHA-256: 5fc405691104832806ed8530d77bfe31206e08ccf98f0b8648ec094e913e4515
156 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains a large number of external links, many pointing to Weebly and other domains, suggesting a link farm or distribution mechanism. While no scripts were explicitly extracted, the PDF structure and heuristic firings indicate a malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://bologen.ru/award?keyword=bangkok+city+map+english+pdf PDF link annotation
    • https://gewavidabu.weebly.com/uploads/1/3/0/7/130775927/xozaxamafekope.pdfIn PDF document text
    • https://favobilumosuxo.weebly.com/uploads/1/3/4/7/134733594/a43995.pdfIn PDF document text
    • http://nuverlites.online/house_rent_receipt_templatesnx6uv.pdfIn PDF document text
    • http://mantenancie.com/easy_math_quiz_diva_questions_and_answerse1y96.pdfIn PDF document text
    • http://probmake12.xyz/bleacher_report_nfl_score_predictions_week_7nq7qk.pdfIn PDF document text
    • http://agreevudb.rest/aw_tozer_sermon_index0t14z.pdfIn PDF document text
    • http://iwhite.space/noche_de_amor_mary_balogh_gratis5wj88.pdfIn PDF document text
    • https://tawozajoruje.weebly.com/uploads/1/3/4/3/134314125/femegokibazig-govod-nurudetor.pdfIn PDF document text
    • https://revotifolalowo.weebly.com/uploads/1/3/4/7/134716495/kiragekodoz_mumikinosa_jewojiripure.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/ropidadegaxut/adobe_acrobat_pro_9._x.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f39e3ba2-b6bc-452e-bbee-49cc3e9b0e79/sujoradiwopabonumosejawi.pdfIn PDF document text
    • https://s3.amazonaws.com/zoromexemuzid/wuwimatilivegimaxiwegile.pdfIn PDF document text
    • https://s3.amazonaws.com/genukopapovixo/womirozakutulojovi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1fd1d80f-dfca-485b-8a72-99a9b4371577/codes_and_conventions_of_tv_drama.pdfIn PDF document text
    • https://s3.amazonaws.com/jevopemosod/how_to_square_root_symbol_on_android.pdfIn PDF document text
    • https://s3.amazonaws.com/sajatesawodiji/unreal_marketplace_submission_guidelines.pdfIn PDF document text
    • https://s3.amazonaws.com/ruzumeb/45018807477.pdfIn PDF document text
    • https://s3.amazonaws.com/davubewu/cantico_delle_creature_commento.pdfIn PDF document text
    • https://s3.amazonaws.com/zumomasugipeno/addition_and_subtraction_of_fraction_worksheet_doc.pdfIn PDF document text
    • https://s3.amazonaws.com/palikuvexake/4640093492.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d0cd1771-be9e-46e8-b14e-26208f505a24/pitezopuxivekuk.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_off0000f576.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF576 5688 bytes
SHA-256: f63302507e50eb506eb70ad822efb239e0d24695ee8f98161697ee2f84c86337
font_01_sfnt_off000108c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x108C8 10208 bytes
SHA-256: 82ef15c6bb6c3d0e77c093f4eb148f41b757cb41ae060558077f9c6299529739

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