Malicious PDF — malware analysis report

Static analysis result for SHA-256 b9602ae3fcdc9269…

MALICIOUS

PDF

60.0 KB Created: 2020-11-02 00:13:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: 17a8082e8c965cb5c2bc80f919c4f14b SHA-1: d8e7ee8e205aa33423dee23f5bef15ffdd1eeac0 SHA-256: b9602ae3fcdc9269c9daaa10dc02f36e41c33cbd7d5eee25d92c3466c98b1b65
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm and routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

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.club/pify?keyword=amazon+prime+glucocil In PDF document text
    • https://nabutamu.weebly.com/uploads/1/3/4/5/134525390/6ed2fb646365bcc.pdfIn PDF document text
    • https://junoxavod.weebly.com/uploads/1/3/1/3/131384771/4692960.pdfIn PDF document text
    • https://moxitasa.weebly.com/uploads/1/3/1/4/131454719/6347600.pdfIn PDF document text
    • https://xonujofepip.weebly.com/uploads/1/3/4/3/134385468/bopumesipej_vekibof_wevawipotojaboz_golarovu.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://s3.amazonaws.com/vukumesoj/cambridge_latin_course_book_3_download.pdfIn PDF document text
    • https://s3.amazonaws.com/zaxuledo/basic_calculus_grade_11_deped_tambayan.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/31c974da-001e-48ad-8f2d-9d2469f43bb8/nuwizeju.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/73151ace-7155-4aa3-be6e-74509932acd6/disokulisowup.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f7073bfe-b27e-48ca-9242-7568adce80be/the_johnson_family_vacation_watch_online.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b58097be-4ea6-4f7d-8ddf-4c687790aa3a/a_modern_approach_to_regression_with_r_solutions.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5148b07d-9499-4a37-85e4-7e8cd19a8262/45401271642.pdfIn PDF document text
    • https://s3.amazonaws.com/zemigiduwagafu/casio_g_shock_5146_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/274c2389-695a-4a08-9247-cd25ce9896aa/test_mode_windows_10.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000715c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x715C 4916 bytes
SHA-256: a7e00ffae60859e8b6d258e9040baf61bfc7aee9cb85c94c6477a82464abbc2e
font_01_sfnt_off000081eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x81EB 5020 bytes
SHA-256: f70189fe8e1396cde3d48f2f852e37c9cd22d0d0b266af5140544877e5db6f37
font_02_sfnt_off0000944c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x944C 12296 bytes
SHA-256: 641356c2cb57e2a972cf63922c90fbd054797682b29d59b9b9a8bc542c050bfa
font_03_sfnt_off0000be27.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBE27 16168 bytes
SHA-256: 794d8cc090a449e0d460036171b2d5b2c749cb0dc3f17972c44626ada68ee3d8
font_04_sfnt_off0000d32d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD32D 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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