Malicious PDF — malware analysis report

Static analysis result for SHA-256 007686267976232a…

MALICIOUS

PDF

57.7 KB Created: 2020-11-05 01:52:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: 3c0018f39945c2784b28694a0ebbd704 SHA-1: 16c8f789987e65d7c87cca5d6b0a0160e7ee8e6c SHA-256: 007686267976232a5010b1150d052e5ca2ea11d4fb3f77e32b3201df2442b9cd
162 Risk Score

Malware Insights

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

The PDF document contains numerous embedded links, including one identified as a malicious redirector. The heuristic 'SE_INVOICE_LURE' suggests the document's content is designed to trick the user into clicking these links, likely to download a second-stage payload. The ML classifier strongly indicates maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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://ttraff.ru/123?keyword=selection+predicate+relational+algebra In PDF document text
    • https://cdn-cms.f-static.net/uploads/4380229/normal_5f8f64395f4bc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372378/normal_5f9ac8e124910.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417983/normal_5f99846befba4.pdfIn PDF document text
    • https://sojutobifedurex.weebly.com/uploads/1/3/4/5/134588439/a22c5391c.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/c8d1e4e7-4b6c-4c0b-8f27-a48457c311f5/zepugotajorikafudurubod.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c887740b-3c97-42d2-bccd-d05ab3495d60/70795632418.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1443792a-8613-41a5-b149-8db8a19bb1d5/ya_problemleri_test.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/90721292-15bc-41a3-b196-008a31bd0d20/liguzukaromok.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/db708b7c-2649-4fae-88d8-0792c902b8ff/injerto_de_limon_y_granada.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/66f5a9a2-07ad-4f59-8178-433b6bc73e81/what_channel_is_fox_on_fios.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f22ec831-df45-4d45-acc1-c54f972b47fb/redeem_code_for_gta_5_xbox_360.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a7d0fc2b-debf-4824-bd6c-b3e84c8bbb85/the_neighborhood_full_album.pdfIn PDF document text
    • https://s3.amazonaws.com/muvunekagok/the_fun_they_had_isaac_asimov_audio.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_off0000a273.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA273 5308 bytes
SHA-256: 59efda87b87395131578b03814424148d74db298a73cb66fad27e9840bb0b9fe
font_01_sfnt_off0000b485.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB485 11324 bytes
SHA-256: 4b12afa5adbabf0896784084dc8e07d5abfe5abd22368394afec1e31458e70b3

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