Malicious PDF — malware analysis report

Static analysis result for SHA-256 24cadb8236ea5898…

MALICIOUS

PDF

50.2 KB Created: 2020-10-18 06:06:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-19
MD5: 9d52aa4c0b945086fdf2a75f280b80f5 SHA-1: aeb6b972072b2b49933e328cf17b7933cfbab6a5 SHA-256: 24cadb8236ea5898767a38d6bddd2d61c3fe71c54297ae1df7d8100b5d46b803
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://ggtraff.ru/123?keyword=excalibur+umbra+build+guide In PDF document text
    • https://cdn-cms.f-static.net/uploads/4365525/normal_5f878b7188079.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366027/normal_5f89a4b530f63.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366652/normal_5f895708b5d15.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370530/normal_5f88b175b887d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380079/normal_5f8b8308cd8b3.pdfIn PDF document text
    • https://xojerajap.weebly.com/uploads/1/3/1/3/131384359/foburadip.pdfIn PDF document text
    • https://xuwuperozaposa.weebly.com/uploads/1/3/2/3/132303395/0d1a3.pdfIn PDF document text
    • https://tidemipevu.weebly.com/uploads/1/3/0/7/130740592/semoxowiwelile.pdfIn PDF document text
    • https://besiwalufeg.weebly.com/uploads/1/3/2/6/132696214/pafesoveboxukadaxeta.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367667/normal_5f8ba93e6e624.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365998/normal_5f8b64f0e5002.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375342/normal_5f8b582682c7d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367005/normal_5f872eb06dd97.pdfIn PDF document text
    • https://tabogivazosepa.weebly.com/uploads/1/3/1/8/131871767/51154e85926.pdfIn PDF document text
    • https://debasomi.weebly.com/uploads/1/3/0/7/130739769/18b3dc9062.pdfIn PDF document text
    • https://sixapinipuso.weebly.com/uploads/1/3/1/3/131384402/3231084.pdfIn PDF document text
    • https://kusebedanosude.weebly.com/uploads/1/3/1/1/131163667/5670049.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/29e8bed1-ccf2-4f7f-9d9c-c65287e6b5c8/52100701970.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/33da81cf-a14b-496c-b68a-9640e18745e4/59896616081.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000648e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x648E 4832 bytes
SHA-256: 8ddfa9cdad26fbc9dd51072a3c5e623de3992228e75c3a9b896d8d86a6fdbd32
font_01_sfnt_off000074ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x74ED 10244 bytes
SHA-256: 4f002f7340f4b2fdf04105bedf34b1d4b96fe8478f70519aeee00d1fa89ee809
font_02_sfnt_off00009829.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9829 16108 bytes
SHA-256: 6bf102e3b6f02edc66f81286f32fa0ce54e16db93fea414d2817afcdfc2f2ec8
font_03_sfnt_off0000acf8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xACF8 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3