Malicious PDF — malware analysis report

Static analysis result for SHA-256 210b462d52f51a32…

MALICIOUS

PDF

64.6 KB Created: 2021-02-18 10:22:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: a979a10961d46a500daedaaa30d24577 SHA-1: f74f5b7310968ab5f64ede497d4e397c98509750 SHA-256: 210b462d52f51a323d609908b55384245cfc375aa7ae56e5ca0a27be7c71203d
176 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection and an ML classifier. The 'SE_CALLBACK_LURE' heuristic indicates the document is designed to trick users into calling a phone number, likely for a scam. While no scripts were explicitly extracted, the PDF structure and embedded URIs suggest it may leverage JavaScript for malicious purposes, potentially to download further payloads or redirect users to phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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://jacksth.ru/123?utm_term=fitbit+charge+hr+set+clock PDF link annotation
    • http://zifepebatidiwig.22web.org/37893211230.pdfIn PDF document text
    • https://jevejokanidepit.weebly.com/uploads/1/3/0/9/130969277/telilazabusel-tubuvixeje-visepa.pdfIn PDF document text
    • https://cdn.sqhk.co/sabepakofo/Iciilii/cashflow_game_free_download_for_pc.pdfIn PDF document text
    • http://ritixabig.iblogger.org/varotefagilefudelox.pdfIn PDF document text
    • https://goxatuzibifonev.weebly.com/uploads/1/3/0/7/130739188/kugorefi.pdfIn PDF document text
    • https://ganuwikudafo.weebly.com/uploads/1/3/0/7/130775291/fobisebesoda.pdfIn PDF document text
    • https://xebazasasixuj.weebly.com/uploads/1/3/4/6/134641459/papup_pawale_relufez.pdfIn PDF document text
    • https://cdn.sqhk.co/lakivasulis/gYjcgjO/hide_and_seek_game_download_uptodown.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/xisakazelelinim/gta_5_lspdfr_calloutsv.pdfIn PDF document text
    • https://s3.amazonaws.com/divexikav/mancom_report_meaning.pdfIn PDF document text
    • http://zufelagek.rf.gd/13560196444.pdfIn PDF document text
    • https://s3.amazonaws.com/nakevoja/koresowot.pdfIn PDF document text
    • https://s3.amazonaws.com/dabatisew/vocabulary_for_ielts_with_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/diwitapezu/winevidorufavozo.pdfIn PDF document text
    • https://s3.amazonaws.com/womirofop/carrom_board_game_karna.pdfIn PDF document text
    • https://s3.amazonaws.com/tufitijinexu/reimbursement_expense_report_quickbooks.pdfIn PDF document text
    • https://s3.amazonaws.com/kibavutibeved/personal_boundaries_worksheet_therapist_aid.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b77e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB77E 4904 bytes
SHA-256: 79e4785ba220ee1d2d45e0948802357b7728ca1b0f40ee2000a109c1c530bfa1
font_01_sfnt_off0000c83a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC83A 9000 bytes
SHA-256: 389b80cd82973b982fa4ffb496d79d8d047417bdef83cecc42dee4a0718a6410
font_02_sfnt_off0000e700.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE700 4324 bytes
SHA-256: ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230

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