Malicious PDF — malware analysis report

Static analysis result for SHA-256 0a91d2a76e0dcde4…

MALICIOUS

PDF

47.1 KB Created: 2020-10-04 01:53:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 904a70ea26c47389daa4696670a8ae54 SHA-1: 7ec5352bcd3627562506e30d9e23d21ce6e8b328 SHA-256: 0a91d2a76e0dcde402bd51a111e95f5910a0fbf6ef1bfd0898599c4a9dd2ec93
154 Risk Score

Malware Insights

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

The PDF contains numerous links, including one that redirects to malicious infrastructure, disguised with a lure for 'Pokemon x and y rom for android'. The ML classifier strongly flagged this PDF as malicious. The presence of embedded URLs and the redirection to a suspicious domain indicate an attempt to lead the user to a malicious site, likely for further exploitation or credential harvesting.

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=pokemon+x+and+y+rom+for+android In PDF document text
    • http://tureni.starmembership.org/uploads/1/3/0/8/130814328/4968058.pdfIn PDF document text
    • http://files.juliebrokken.com/uploads/1/3/1/4/131453387/rifudubexizajopudiru.pdfIn PDF document text
    • https://site-1036958.mozfiles.com/files/1036958/76713306193.pdfIn PDF document text
    • https://site-1039534.mozfiles.com/files/1039534/jonifesefegixe.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://cdn.shopify.com/s/files/1/0433/0392/7973/files/13722704054.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2740/6746/files/spokane_motorcycle_swap_meet.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0604/2023/files/parents_anniversary_speech_from_daughter.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8316/0983/files/faseguwezozemon.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/5597/2506/files/pathfinder_monstrous_companion_guide.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_off00006d3b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6D3B 4784 bytes
SHA-256: 9b6e4281fcd975db9ef114d87f36c12142842e2496bd56bcc26c061f9ee88036
font_01_sfnt_off00007d66.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7D66 10712 bytes
SHA-256: 00fcf049cb2da5ed14e387703fd99f47945d9b4f7d67cb0a38e97682b3b318cb
font_02_sfnt_off0000a20f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA20F 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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