Malicious PDF — malware analysis report

Static analysis result for SHA-256 284a644ae7a1e75b…

MALICIOUS

PDF

76.3 KB Created: 2021-05-21 18:43:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 2942d09ef333390c93b4451127c74d86 SHA-1: 988313c0b29d02c9124899a4f6a8e1fda028f88e SHA-256: 284a644ae7a1e75be118088071d47b8e66eb4c57b78d7b6cde1f2863f3978237
164 Risk Score

Malware Insights

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

This PDF file was detected as malicious by multiple heuristics, including a critical ClamAV detection and an ML classifier. The presence of a 'SE_INVOICE_LURE' heuristic suggests the document is designed to trick the user into clicking a link, which is further supported by the embedded URL pointing to a suspicious domain. The PDF also contains a link farm, indicating a potential attempt to distribute malicious content or engage in SEO manipulation for phishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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
  • 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.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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://maypoin.ru/strik?utm_term=how+much+does+a+22+caliber+bullet+drop+at+100+yards PDF link annotation
    • https://sizikipumaxa.weebly.com/uploads/1/3/0/7/130739349/joradilujukuwus_sinimebalefep_filofezib.pdfIn PDF document text
    • https://dapunilak.weebly.com/uploads/1/3/4/5/134506399/fekisaj.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/dukavunivifa/what_is_a_democratic_citizen.pdfIn PDF document text
    • https://s3.amazonaws.com/wulagisi/83689654619.pdfIn PDF document text
    • https://s3.amazonaws.com/pidufozu/immunization_form_3231_ga.pdfIn PDF document text
    • https://s3.amazonaws.com/zifilobesumafi/sovep.pdfIn PDF document text
    • https://s3.amazonaws.com/dinilederu/58080627422.pdfIn PDF document text
    • https://s3.amazonaws.com/vezumobigodub/58333529967.pdfIn PDF document text
    • https://s3.amazonaws.com/towakog/macbeth_study_guide_answers_act_2_scene_1.pdfIn PDF document text
    • https://s3.amazonaws.com/wexukufedepim/49785666238.pdfIn PDF document text
    • https://s3.amazonaws.com/pesetufavo/project_finance_excel_sheet.pdfIn PDF document text
    • https://s3.amazonaws.com/visagogijulep/how_to_remove_toyota_ecu_pins.pdfIn PDF document text
    • https://s3.amazonaws.com/selivuvumepaveb/icsi_training_quarterly_report_upload.pdfIn PDF document text
    • https://s3.amazonaws.com/sebunuzu/gewawekofivu.pdfIn PDF document text
    • https://s3.amazonaws.com/kegovev/71900266558.pdfIn PDF document text
    • https://s3.amazonaws.com/sasufufa/jalitolak.pdfIn PDF document text
    • https://s3.amazonaws.com/zarelusipofox/bowolajano.pdfIn PDF document text
    • https://s3.amazonaws.com/setigafat/fewukuxu.pdfIn PDF document text
    • https://s3.amazonaws.com/kakef/33372326058.pdfIn PDF document text
    • https://s3.amazonaws.com/tidigudetefumof/bharat_gas_online_payment_receipt.pdfIn PDF document text
    • https://s3.amazonaws.com/jagux/xobojar.pdfIn PDF document text
    • https://s3.amazonaws.com/baposivarabuj/27071031455.pdfIn PDF document text
    • https://s3.amazonaws.com/numunenoji/antiquity_board_game_rules.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_off0000e8ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8FF 5932 bytes
SHA-256: c7ad68d071f140f16d5069efd0588c11f489fa0853bc0c5de304471ab1b212aa
font_01_sfnt_off0000fd18.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD18 11220 bytes
SHA-256: aa1062f656bcc411a9eaf0da5f0452d106f18dda2e98f78ee46d54c85d3d8c5a

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