Malicious PDF — malware analysis report

Static analysis result for SHA-256 a89379eb35d288dd…

MALICIOUS

PDF

54.2 KB Created: 2020-11-03 22:10:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-23
MD5: f4aded7f484e603b56e97ab7eb28a562 SHA-1: 033a0703919cbbf9e9ef8f1d1f69b3c4e2dd6e4f SHA-256: a89379eb35d288dddfe2d07d5efec82542dcf9ad077a623465c21c1220b95313
184 Risk Score

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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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=codehs+javascript+and+graphics+answers In PDF document text
    • https://lavigepes.weebly.com/uploads/1/3/4/4/134437347/e07f9f1ebd35b09.pdfIn PDF document text
    • https://jefogozadiz.weebly.com/uploads/1/3/4/0/134040800/nezoxi-xanemoke-tofeg-muvog.pdfIn PDF document text
    • https://jizonuwuko.weebly.com/uploads/1/3/0/8/130814311/lamid.pdfIn PDF document text
    • https://mefemanodi.weebly.com/uploads/1/3/1/4/131454269/pokivevigixute-zuwevomokap.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421209/normal_5f9dbc078c502.pdfIn PDF document text
    • https://bofufawikifof.weebly.com/uploads/1/3/4/2/134235483/jojagu.pdfIn PDF document text
    • https://wekubuzebebam.weebly.com/uploads/1/3/0/7/130739705/5342776.pdfIn PDF document text
    • https://malinozibide.weebly.com/uploads/1/3/4/3/134380659/xirad.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375702/normal_5f93961f79319.pdfIn PDF document text
    • https://zukezima.weebly.com/uploads/1/3/4/3/134345014/wefivewivit.pdfIn PDF document text
    • https://kirasupi.weebly.com/uploads/1/3/4/4/134442552/lurefeji.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/9f1b3b96-3457-4fe6-9199-cf56f69c8b9c/37503069995.pdfIn PDF document text
    • https://s3.amazonaws.com/pibabopuduj/5857632311.pdfIn PDF document text
    • https://s3.amazonaws.com/lefemijip/64314727700.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007c27.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7C27 5436 bytes
SHA-256: 815d7b60fa3ba4739b19a3e73cbdbd6253e09877458425560d059261152d66c8
font_01_sfnt_off00008eb1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8EB1 11312 bytes
SHA-256: 29feeffd8d98b4d3bca0675dee0b6912640c7edd3b77b5cf073ee048b79bbd17
font_02_sfnt_off0000b55d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB55D 16376 bytes
SHA-256: f267a97a42ed964490c0c36cf8d24d30f5cfc386ee24850e75bb3a4991f11828

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