Malicious PDF — malware analysis report

Static analysis result for SHA-256 e57cdb93409b35ab…

MALICIOUS

PDF

57.7 KB Created: 2020-10-02 20:41:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-02-23
MD5: 1da14f9fab8f04a4a63798d99fc0b007 SHA-1: d6ceda250efa749ca5feb3395dc7c7d9ce895cd2 SHA-256: e57cdb93409b35abdade19b6ed5c985b5c5dfc2f95bd01fb81a8643cd899f3b9
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/pify?keyword=csulb+study+abroad+summer+2019 In PDF document text
    • http://files.stoddensfarmcottages.com/uploads/1/3/0/7/130776804/tojejizopene_xibawafez_bemejekidukoli_jusog.pdfIn PDF document text
    • http://files.carpetcleaningmuskoka.ca/uploads/1/3/1/3/131379252/7826694.pdfIn PDF document text
    • http://files.risingartistfestival.com/uploads/1/3/0/7/130775848/7878248.pdfIn PDF document text
    • http://nirofemav.delightthyself.com/uploads/1/3/1/3/131397997/gukogakapezagapadix.pdfIn PDF document text
    • http://pitad.communitycatcarecenter.com/uploads/1/3/0/7/130739693/332251.pdfIn PDF document text
    • https://site-1038482.mozfiles.com/files/1038482/22520532824.pdfIn PDF document text
    • https://site-1039707.mozfiles.com/files/1039707/duzapajof.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/c7822012-fc0b-4558-b6a0-7c212e19ed2c/lazomaloveverikuvavukago.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/facd7ad5-7276-43a0-890a-b83682834e08/39662020798.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1db98687-51f2-4552-90a8-99575c34f4fe/zagiv.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/75cc0123-80be-47c6-ba7d-0de5d3949892/powaremegubodabajogowara.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a4394f33-3278-4eb3-ad15-85872349a589/gonusigolikuvu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e510dbcb-fbb7-4764-8f5e-11f52df3a1f3/lukazirizuwobemimuporonoz.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_off0000a486.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA486 5600 bytes
SHA-256: 6aa9097225dedf86776fc22ecf7fb70719d19f83fd60d1d1a2d5f75a21988ebc
font_01_sfnt_off0000b773.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB773 10288 bytes
SHA-256: 0cf80dc0fcc3d0b4c28a0a0f40e55ab3fe7f0221b80655cb651a0d7c8dadbdec

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