Malicious PDF — malware analysis report

Static analysis result for SHA-256 626fa57f5e1054c1…

MALICIOUS

PDF

74.2 KB Created: 2021-02-26 11:47:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 428f31cbba8d6a34b5255a7df8d58e24 SHA-1: a21e32b20a0c9f1eb3a5fc7235cd7a694067ed24 SHA-256: 626fa57f5e1054c1736be059e1b4b3ff0d8339c566d5b8cc315196e75ae7a584
136 Risk Score

Malware Insights

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

The PDF contains multiple suspicious links, with one explicitly noted as an 'invisible link to suspicious domain'. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. Although no scripts were directly extracted, the PDF structure and embedded URLs suggest it's designed to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • Image-heavy PDF with invisible link to suspicious domain high PDF_SUSPICIOUS_LINK_LURE
    PDF is a small image-heavy lure with invisible link annotations that send the user to a suspicious high-risk-domain URI. This matches credential-phishing carriers where the visible document is only a prompt and the real collection flow happens on the linked website.
  • 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://jottigo.ru/wix?keyword=apb+reloaded+guide PDF link annotation
    • http://resimpub.com/qa_weekly_status_report_samplebo48r.pdfIn PDF document text
    • http://italywom.space/black_and_decker_40v_cordless_trimmer_troubleshootingitj73.pdfIn PDF document text
    • http://lemiritafuwab.22web.org/fertility_calculator_calendar.pdfIn PDF document text
    • http://securityofusersdevicesonline.site/landing_page_wordpresstd92o.pdfIn PDF document text
    • https://cdn.sqhk.co/benanejufa/high84j/94507910797.pdfIn PDF document text
    • http://propovar.ru/javascript_tutorial_udemy_freeze4s4.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/degisapemifa/clinical_hematology_atlas.pdfIn PDF document text
    • https://s3.amazonaws.com/zumezeviwakiz/zumamiludupefibof.pdfIn PDF document text
    • http://xazitew.epizy.com/66029235305.pdfIn PDF document text
    • https://s3.amazonaws.com/metakibeme/what_is_the_moral_of_green_eggs_and_ham.pdfIn PDF document text
    • https://s3.amazonaws.com/bejokazemur/fiddler_on_the_roof_tradition_violin_sheet_music_free.pdfIn PDF document text
    • https://s3.amazonaws.com/punagilelabon/kabhi_jo_badal_barse_song_ming.pdfIn PDF document text
    • https://s3.amazonaws.com/xewamejixolefaj/free_printable_place_value_chart_with_decimals.pdfIn PDF document text
    • https://s3.amazonaws.com/supefujoxopubu/arcgis_network_analyst_extension.pdfIn PDF document text
    • https://s3.amazonaws.com/fonibinaraj/chainsmokers_paris_hd_video.pdfIn PDF document text
    • https://s3.amazonaws.com/nonipesikiri/87463307303.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_off0000e7f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7F6 5076 bytes
SHA-256: ff83f2a4b031daa6c6803eea1a97e95df22c4c3d959d74526dff3a67f4b7b53e
font_01_sfnt_off0000f93f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF93F 10184 bytes
SHA-256: 8ee17b685a1de40f54be9e225a5b19579484b71c39d80a00c8e3a06ad570bdbb

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