Malicious PDF — malware analysis report

Static analysis result for SHA-256 ec7a995bf9fc0e36…

MALICIOUS

PDF

43.9 KB Created: 2020-11-07 02:43:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 8e6cde332b0a586b93256428694bca76 SHA-1: 1915f28f7a72bff7cc4d579d909960afdf82da0e SHA-256: ec7a995bf9fc0e36400d59bbefd4e9ec06abea924dbb40a754940a523d598069
154 Risk Score

Malware Insights

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

The PDF contains numerous links, with a critical heuristic firing indicating it points to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains a URL that matches the one identified by the redirector heuristic. The presence of a link farm suggests an attempt to distribute malicious content or engage in SEO poisoning.

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://traffking.ru/123?keyword=stargate+convention+chicago+2020 In PDF document text
    • https://benoralegofalaw.weebly.com/uploads/1/3/4/5/134581061/1f822dc2.pdfIn PDF document text
    • https://virukuzababije.weebly.com/uploads/1/3/4/3/134350100/tutila.pdfIn PDF document text
    • https://vadulovoke.weebly.com/uploads/1/3/4/3/134338980/7293289.pdfIn PDF document text
    • https://nixewoxeb.weebly.com/uploads/1/3/4/3/134354190/gasatopawewoji.pdfIn PDF document text
    • https://tavumake.weebly.com/uploads/1/3/2/7/132740551/titefagat.pdfIn PDF document text
    • https://nefavegipu.weebly.com/uploads/1/3/4/3/134365482/rogazani.pdfIn PDF document text
    • https://kogewovedof.weebly.com/uploads/1/3/4/3/134339257/d0a3895a.pdfIn PDF document text
    • https://tekegalesi.weebly.com/uploads/1/3/0/7/130740489/gekowibulumudi.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://uploads.strikinglycdn.com/files/68ab1212-3c9b-4c91-a5b1-e3ed52d31fcc/vonisutirow.pdfIn PDF document text
    • https://s3.amazonaws.com/rexogeguxosix/d_and_d_5e_battlemaster.pdfIn PDF document text
    • https://s3.amazonaws.com/vopadofugon/taredegi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f2cd4981-1f07-4ad3-b1c0-a4f3ccefa70b/43541013751.pdfIn PDF document text
    • https://s3.amazonaws.com/palikuvexake/phim_hong_kong_long_tieng_bo.pdfIn PDF document text
    • https://s3.amazonaws.com/lokijuronig/bomamosexakirirulu.pdfIn PDF document text
    • https://s3.amazonaws.com/memul/canadian_citizenship_test_2018_ontario.pdfIn PDF document text
    • https://s3.amazonaws.com/gifojuxaxeva/xidawemilenofip.pdfIn PDF document text
    • https://s3.amazonaws.com/wonoti/capacity_building_notes.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_off00005d74.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5D74 5076 bytes
SHA-256: 9dfa8ad3ad17b091f3cf3f99c1cbb63e5be4396faa7982881e7575786c572871
font_01_sfnt_off00006e9f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6E9F 10992 bytes
SHA-256: 59c3151a0669bee5f8e941b13d4266947eb41c4cb2bf3be2a1b908c0f0cb4d41
font_02_sfnt_off00009429.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9429 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

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