Malicious PDF — malware analysis report

Static analysis result for SHA-256 fba332726feb4f7b…

MALICIOUS

PDF

41.4 KB Created: 2020-10-31 21:30:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 562b644812397bd512b01bf79f6673d9 SHA-1: 28b8e7bb4a46112e4624fb497e7781c3f6c8fbd6 SHA-256: fba332726feb4f7ba1409ea8cc84e8e14f91bbb1961e1e635d6bf4bbb1bf7258
94 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by an ML classifier. The file 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 3

  • 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.
  • 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://ggtraff.ru/123?keyword=black+bear+lake+tahoe In PDF document text
    • https://cdn-cms.f-static.net/uploads/4417206/normal_5f9a8af7256d4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409396/normal_5f95a6e29f052.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380882/normal_5f9a674822593.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/mejawiwomak/beginner_gym_program.pdfIn PDF document text
    • https://s3.amazonaws.com/gupawupigawono/bexamasenozulujafitob.pdfIn PDF document text
    • https://s3.amazonaws.com/sugaguxagu/bogusonabosininugesubog.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/31147436-8fe4-4656-ba9b-d9b1c21ff82b/xegoponuwadutamugunolexom.pdfIn PDF document text
    • https://s3.amazonaws.com/fojaxexino/liwagupevo.pdfIn PDF document text
    • https://s3.amazonaws.com/kosipefojaw/dupadexopatigigub.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5dec7c62-f90c-4d7c-b2a6-25ffd6941e69/seranejikuvupafasujulagob.pdfIn PDF document text
    • https://s3.amazonaws.com/rotowan/20883039343.pdfIn PDF document text
    • https://s3.amazonaws.com/jadudusujuje/colonial_arms_apartments_wethersfield_ct.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d75216ff-e5e5-435c-a88a-755f9054fab0/15532794511.pdfIn PDF document text
    • https://s3.amazonaws.com/fasanag/ponapojepidexalelurepowas.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_off000063d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x63D4 4960 bytes
SHA-256: 631369fce56a224b569d52c16d5301f36a516f932ef0dcc647815f10143d3f4a
font_01_sfnt_off000074ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x74AE 10696 bytes
SHA-256: ef75388612c226e694ab6d2444bf3010d49c83aab30baab7bef576a8ed1561f0