Malicious PDF — malware analysis report

Static analysis result for SHA-256 1a4091f491ce219f…

MALICIOUS

PDF

45.9 KB Created: 2020-10-15 14:17:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 766d8962b01c1a024091864cb4df9b84 SHA-1: 2ed09ecff28748eb4c0bc099e6cfcd82dde6566d SHA-256: 1a4091f491ce219fbd9b2380a6657efe4b07b432262899f28066a94331a8fd76
124 Risk Score

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 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/strik?keyword=play+store+apk+android+4.4.2 In PDF document text
    • https://cdn-cms.f-static.net/uploads/4367279/normal_5f87828e729b7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366401/normal_5f8729cf26a85.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366337/normal_5f8724badec59.pdfIn PDF document text
    • https://site-1043408.mozfiles.com/files/1043408/besodog.pdfIn PDF document text
    • https://site-1038670.mozfiles.com/files/1038670/19084713929.pdfIn PDF document text
    • https://site-1043248.mozfiles.com/files/1043248/86229578407.pdfIn PDF document text
    • https://site-1037130.mozfiles.com/files/1037130/lukeb.pdfIn PDF document text
    • https://site-1036735.mozfiles.com/files/1036735/66423544176.pdfIn PDF document text
    • https://site-1038932.mozfiles.com/files/1038932/65060341823.pdfIn PDF document text
    • https://site-1038313.mozfiles.com/files/1038313/vodoz.pdfIn PDF document text
    • https://site-1037125.mozfiles.com/files/1037125/jewiraruxepim.pdfIn PDF document text
    • https://site-1044018.mozfiles.com/files/1044018/63816839084.pdfIn PDF document text
    • https://site-1044145.mozfiles.com/files/1044145/jorivulejiranemo.pdfIn PDF document text
    • https://site-1040988.mozfiles.com/files/1040988/zonunutaxepulewi.pdfIn PDF document text
    • https://site-1039688.mozfiles.com/files/1039688/jojevisek.pdfIn PDF document text
    • https://site-1037922.mozfiles.com/files/1037922/batudejewurelakaborug.pdfIn PDF document text
    • https://site-1039460.mozfiles.com/files/1039460/jelisagezisexibadusol.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://cdn.shopify.com/s/files/1/0434/3418/0769/files/65373602888.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/7121/2193/files/suzewuwukite.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4997/4946/files/wanirani.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0503/8745/2078/files/galactic_civilizations_3_guide_2020.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000675c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x675C 5160 bytes
SHA-256: fda59b4ebc2bddfa22747bc685a2d95b6cdbb1f0076d732891806b7cc3658283
font_01_sfnt_off00007903.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7903 10744 bytes
SHA-256: 6336c9537c5d90e3a6663bc0e47c9406a4627abc06b73f54ca968888ad75da95
font_02_sfnt_off00009c75.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9C75 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

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