Malicious PDF — malware analysis report

Static analysis result for SHA-256 632b565131daf325…

MALICIOUS

PDF

93.5 KB Created: 2021-01-30 08:18:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 44d7a637b912a44579a6792998ef48ae SHA-1: 6a5305213dfb1ff5d5b28f90127af38f687b4d87 SHA-256: 632b565131daf325fcb066cf2f843756dc5ed6fc0f119996431ffa1f3a69ab26
94 Risk Score

Malware Insights

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

The PDF contains a link disguised as a search result, directing users to a known malicious redirector. The ML classifier strongly indicates malicious intent, and the embedded URL is flagged as malicious. The document body, though heavily obfuscated, contains text related to search queries, reinforcing the lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 3

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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://yafferge.ru/wb?keyword=car%20repair%20shops%20near%20me%20open%20now In PDF document text
    • https://static.s123-cdn-static.com/uploads/4473415/normal_5fe4dc0ccd3b0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420748/normal_6011813ab9f36.pdfIn PDF document text
    • https://cdn.sqhk.co/gukokefa/oTgdthg/park_masterson_basketball.pdfIn PDF document text
    • http://ruroraratotu.66ghz.com/baked_sheet_pan_chicken_tenders.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4371799/normal_5ff0a8dc989b6.pdfIn PDF document text
    • http://zegevuk.22web.org/sound_of_music_edelweiss_piano_sheet_music.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4419452/normal_5fe287dabce71.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/takebemanijewok/whatsapp_gb_2019_atualizado_uptodown.pdfIn PDF document text
    • https://s3.amazonaws.com/bevarolimesale/capecitabine_mechanism_of_action.pdfIn PDF document text
    • http://mamesejo.epizy.com/86669518311.pdfIn PDF document text
    • http://sebipukavore.epizy.com/fusionner_2_en_ligne_gratuit.pdfIn PDF document text
    • http://fatifosavo.rf.gd/wallpaper_hd_2019.pdfIn PDF document text
    • https://s3.amazonaws.com/zerejibixupav/wajimudegitalebemevosefal.pdfIn PDF document text
    • http://pebotavafusu.epizy.com/99300880076.pdfIn PDF document text
    • http://nujafosedoke.epizy.com/invoice_template_html.pdfIn PDF document text
    • https://s3.amazonaws.com/kovilowab/robinson_annulation_reaction.pdfIn PDF document text
    • http://ruguwusizomu.epizy.com/84880767491.pdfIn PDF document text
    • http://malinaliwul.epizy.com/lovakivor.pdfIn PDF document text
    • https://s3.amazonaws.com/bededuxotulapil/2972359053.pdfIn PDF document text
    • https://s3.amazonaws.com/vutame/amsco_world_history_multiple_choice_answers_2018.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_off0001329e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1329E 5024 bytes
SHA-256: d27fb9b4c48faba275dea7cad706bbb059ed60bda97c046b1d463d5ac16e268a
font_01_sfnt_off00014391.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14391 10992 bytes
SHA-256: ec6212c21ed6c81860c26e75065967c6d163baa167dec8eb248867d1511ddd74

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