Malicious PDF — malware analysis report

Static analysis result for SHA-256 a75f7cfa86e6be65…

MALICIOUS

PDF

88.2 KB Created: 2021-03-16 04:18:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 025b4b3c4ad88bd57d0a0e64490aa397 SHA-1: a7c59ead1985c3b3eac0ec8113364efe17cfe856 SHA-256: a75f7cfa86e6be6577a4a3d434039a970cdf503cc040dfc9d3ef9ea650f1be69
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, with a critical heuristic identifying a link farm pattern. One of the embedded URLs, 'https://nipisod.ru/award?keyword=broad+based+black+economic+empowerment+act+pdf', is suspicious and likely leads to malicious content. ClamAV also detected this file as 'Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0', indicating a phishing or trojanized document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://nipisod.ru/award?keyword=broad+based+black+economic+empowerment+act+pdf PDF link annotation
    • http://leree4.club/book_of_enoch_kjvjpvvb.pdfIn PDF document text
    • http://yourbigdick.space/speedy_cash_loan_app_download4048m.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/bulolimepol/what_is_supply_chain_management_system.pdfIn PDF document text
    • https://557345b1-98c6-442d-b460-9e357c178e5b.filesusr.com/ugd/dfb5f8_ed20443153384fbbaa42a0c688cdcae0.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/deba2170-cb83-4372-b640-abaa8e4d386c/corona_tree_pruner_parts_uk.pdfIn PDF document text
    • https://s3.amazonaws.com/napisakaluja/foucault_archeology_of_knowledge.pdfIn PDF document text
    • https://cff07a16-13b2-455b-8a78-148a75b158b4.filesusr.com/ugd/cda0c7_65c8578df0ca4119ac489e4ac59ce8e9.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/8d17622c-b4fd-4a11-8e40-2dcb0e12b52e/funupezataximek.pdfIn PDF document text
    • https://s3.amazonaws.com/seriposuj/how_much_does_a_medical_lab_tech_make_an_hour.pdfIn PDF document text
    • https://s3.amazonaws.com/gebukil/slow_motion_video_editing_app_free.pdfIn PDF document text
    • https://d670dda7-df53-4ef1-8eda-d3256df28744.filesusr.com/ugd/dbbbec_a75669fabc7c49b89878eb85eac71b3d.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/gitipelut/converting_fractions_to_percents_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/jitimesolagun/yard_machine_46_inch_riding_mower_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/buwosevax/practical_electrical_wiring_book.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4c75a180-1aec-49e0-a697-05bf103bc46f/jesufafaxozukenafililup.pdfIn PDF document text
    • https://s3.amazonaws.com/donarepemi/blacksad_integral.pdfIn PDF document text
    • https://s3.amazonaws.com/naxizugenabi/rujovixufibevizovatoduzob.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/65654ffc-0cd8-4ce4-84a6-faa3bdc338cb/74323327642.pdfIn PDF document text
    • https://s3.amazonaws.com/zoluwivebiro/zosowelereto.pdfIn PDF document text
    • https://s3.amazonaws.com/xifabilejilab/90169897983.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9da1e29b-7c29-4a7c-806a-ad7711efd615/project_management_certification_classes_near_me.pdfIn PDF document text
    • https://s3.amazonaws.com/jasadavebaga/pnrc_date_sheet_gnm_2018.pdfIn PDF document text
    • https://s3.amazonaws.com/lemerisinivum/ekornes_stressless_review.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_off000119cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x119CD 5648 bytes
SHA-256: 768dff7a7a0c90957b807c00e455b1dfa5f66bc6836b0f29bfcd9c368774b9ef
font_01_sfnt_off00012cf9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12CF9 11328 bytes
SHA-256: 62b526f56664d1177843a561d169af7cad937d5865bdc777fe64db3453661ca2

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