Malicious PDF — malware analysis report

Static analysis result for SHA-256 0a03bd0f1e8568ba…

MALICIOUS

PDF

79.3 KB Created: 2021-02-19 07:46:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-03
MD5: 82d17240d26406028f58d65dc5eed536 SHA-1: 926215426a1f877bdd3b4498b4e5fb5b4853e0b4 SHA-256: 0a03bd0f1e8568bae29c21963b9a0f7e559f9a5593459aa33b42d26342f08cbf
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, with a critical heuristic identifying it as a link farm. One prominent URL, 'https://bologen.ru/strik?utm_term=toner+f%25C3%25BCr+hp+laserjet+1012', is presented in a way that suggests a lure for users interested in printer supplies. ClamAV and ML classifiers also flagged this PDF as malicious, specifically as a phishing trojan. No scripts were extracted, but the PDF structure itself is designed to redirect users to potentially harmful external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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/strik?utm_term=toner+f%25C3%25BCr+hp+laserjet+1012 PDF link annotation
    • https://cdn.sqhk.co/wogefosa/ibm2x5R/ates_ve_su_2_oyun_skor_oyunu_oyna.pdfIn PDF document text
    • http://instgramcopyrightdispute.com/what_does_the_uncle_sam_character_represent15ha5.pdfIn PDF document text
    • https://gegilegaf.weebly.com/uploads/1/3/1/3/131383227/lebebosasadupi.pdfIn PDF document text
    • https://tasidumil.weebly.com/uploads/1/3/2/6/132680907/jobofojoxoboliloko.pdfIn PDF document text
    • http://aycotoro7.xyz/lofumujemobudomaneler3l3u.pdfIn PDF document text
    • https://pixamowogiru.weebly.com/uploads/1/3/4/5/134590731/6d0762d.pdfIn PDF document text
    • http://lavkavkusa.store/zenanuladipisuloxokd338n.pdfIn PDF document text
    • https://cdn.sqhk.co/sebutarukaw/odhhjid/bokakunanemimizixesat.pdfIn PDF document text
    • https://cdn.sqhk.co/duxisabaza/hgicTjj/sizupaxasusamodagu.pdfIn PDF document text
    • https://libotavod.weebly.com/uploads/1/3/0/8/130813055/sugowewuwiwuxak.pdfIn PDF document text
    • https://cdn.sqhk.co/pananumujo/06ghZgg/25694467270.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/xoferuzu/fidinanikagomo.pdfIn PDF document text
    • https://s3.amazonaws.com/gekojulog/10th_class_result_2019_app.pdfIn PDF document text
    • https://s3.amazonaws.com/muvojugejoxip/fozewefotaw.pdfIn PDF document text
    • https://s3.amazonaws.com/fosalizuzu/macro_code_to_compare_two_excel_sheets.pdfIn PDF document text
    • https://s3.amazonaws.com/zugutixe/35030946769.pdfIn PDF document text
    • https://s3.amazonaws.com/visagogijulep/volkswagen_golf_tdi_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/fotepopunaj/california_dmv_forms_disabled_placard.pdfIn PDF document text
    • https://s3.amazonaws.com/tasufagijaremo/74431587493.pdfIn PDF document text
    • https://s3.amazonaws.com/wonumafubij/76033155224.pdfIn PDF document text
    • https://s3.amazonaws.com/luworizesupox/emissivity_measurement_apparatus_lab_report.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_off0000e8f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8F7 5200 bytes
SHA-256: a9612f7c5107e5c116d57f2a6bef97439579f9abc0c9e1c173f8e851bddf9663
font_01_sfnt_off0000faa9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAA9 11412 bytes
SHA-256: 95dc3ba3ad16309b29ae9797714b523532f5d1edebc7263bfc259a896f90b76a
font_02_sfnt_off00011fd8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11FD8 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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