Malicious PDF — malware analysis report

Static analysis result for SHA-256 fe298f4c98224f74…

MALICIOUS

PDF

49.3 KB Created: 2020-10-17 06:03:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: f0a4704d8a130f7e7bb03692eb6d3073 SHA-1: 409856d9c82e92b5a8fd20688689f0ab08121e96 SHA-256: fe298f4c98224f74ac6938952bd1f5b0b9f454226b99a6493b2baa790156f174
154 Risk Score

Malware Insights

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

The PDF contains embedded links that redirect to malicious infrastructure, as indicated by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body, though partially corrupted, contains text suggesting a lure related to creating PDFs, which is then associated with a malicious URL. The ML classifier also strongly flagged this PDF as malicious, supporting the conclusion that it is designed for malicious redirection.

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://ttraff.me/123?keyword=how+to+create+comic+book+pdf In PDF document text
    • https://vewutaniwem.weebly.com/uploads/1/3/0/8/130873717/lejirebeguxusagi.pdfIn PDF document text
    • https://vuxozajuje.weebly.com/uploads/1/3/1/3/131379873/9653445.pdfIn PDF document text
    • https://vunixumo.weebly.com/uploads/1/3/1/4/131453253/7bb5d4de96bd6.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/6d23c723-5e4d-4cc5-b592-257f37d89c82/68434378304.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/84acac82-b505-49ea-a1f5-2a6b18b15056/waziraminogelopaz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/080aeea3-9919-46c3-822a-c2e29f227b85/57275167962.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0498/0031/5041/files/little_mermaid_cast_2020_ursula.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/1048/0533/files/84856920595.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0479/1671/2100/files/pathfinder_emperor_cobra.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/3624/4118/files/constitution_scavenger_hunt_article_1_legislative_branch.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6550/0060/files/29262451512.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2764de6d-adf8-4a9f-93bf-7e34a6a5ed55/fubuxelofiripivabolim.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b75c4cde-a1d4-4bb7-afb0-70e00a511e69/1710208328.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e5346a17-a883-4fcc-85e1-e62b25f0cca9/gawunenefamixazu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4ff8e6bb-f324-4719-a4de-0e704a6a39e3/jubaxofipolipeleramekod.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e173ae0e-1610-40d4-8ae7-aadebc88eea0/83710763328.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5031e194-ffb8-47c5-b487-bd2acd58fbd0/zimigav.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ff212b29-f8aa-4916-ba81-e037749caceb/75292739181.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_off00007441.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7441 5028 bytes
SHA-256: 3d7bd0219c44c8c986993a3060f2d4cfc6cf6bae4bad8143555f4a7944d9bb35
font_01_sfnt_off00008560.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8560 10620 bytes
SHA-256: 59e854209a93d00edb36f1f31aa33d0bdb814adc1ea3f3a6cf6b6a519442cf71
font_02_sfnt_off0000a991.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA991 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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