Malicious PDF — malware analysis report

Static analysis result for SHA-256 b2223e2cdd36371e…

MALICIOUS

PDF

32.4 KB Created: 2020-11-02 20:58:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 649b7197df3bb5e0a421a583e09adf8c SHA-1: b656050acd8e6b2f629616a7dc6af7f30b315f12 SHA-256: b2223e2cdd36371ec5d181123bd8c90130b68e4f427bcd20beb73d5c8038c959
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded links, with a critical heuristic firing indicating it redirects to known malicious infrastructure. The ML classifier also strongly flagged this PDF as malicious. The embedded URLs suggest an attempt to direct users to potentially harmful content or phishing sites, likely as part of a broader malicious campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • 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.
  • 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://cctraff.ru/strik?keyword=words+for+great In PDF document text
    • https://wegonugu.weebly.com/uploads/1/3/4/0/134040733/01c50.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0501/6656/2966/files/wixubaduwaxemasu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/5423/8369/files/wupukexikur.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4312/7447/files/le_dimanche_des_mres_graham_swift.pdfIn PDF document text
    • https://s3.amazonaws.com/susopuzupure/wusugobudo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/8631/5167/files/62741806564.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/3500/8410/files/the_man_who_shot_liberty_valance_song_lyrics.pdfIn PDF document text
    • https://s3.amazonaws.com/mokuwanibof/24795183722.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/7070/8129/files/buscar_mi_celular_android_por_gps.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_off000042fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x42FA 5056 bytes
SHA-256: 7c3e555222b113d30e717d51db196b9eb37a8a2bc1aee3dfae96f93dfd1ad076
font_01_sfnt_off00005448.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5448 10052 bytes
SHA-256: dd96cead90c70b94f7cc10e8b8f7dc69a4b5962d66747452a66ff0c209fca6c4

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