Malicious PDF — malware analysis report

Static analysis result for SHA-256 7bf3439b65e8f2f0…

MALICIOUS

PDF

73.2 KB Created: 2020-10-13 22:04:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: b91ddaf79582eb4e53fe3c0fbda0b8b0 SHA-1: e21fa6284499e7f63beb982e6447c021cdb8b207 SHA-256: 7bf3439b65e8f2f06a7b71a103a5dc854b43dd7e54d39873333f69d5fe12f3d4
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://gettraff.ru/strik?keyword=derecho+procesal+laboral+pdf+libro In PDF document text
    • https://vuxozajuje.weebly.com/uploads/1/3/1/3/131379873/3257372.pdfIn PDF document text
    • https://fijojonibiw.weebly.com/uploads/1/3/2/6/132681787/bupemigimamuvap.pdfIn PDF document text
    • https://bedizegoresupa.weebly.com/uploads/1/3/1/3/131379398/1696278.pdfIn PDF document text
    • https://jakedekokobara.weebly.com/uploads/1/3/1/3/131381480/nipomomuka_gisotufeje.pdfIn PDF document text
    • https://jakedekokobara.weebly.com/uploads/1/3/1/3/131381480/jolon_koxuzozudanik_makilitinami.pdfIn PDF document text
    • https://zoxuzuxebexot.weebly.com/uploads/1/3/0/9/130969059/tidivobinimigip-banez-batipafon.pdfIn PDF document text
    • https://jawasolasazilem.weebly.com/uploads/1/3/1/3/131379174/zidebesirolabavo.pdfIn PDF document text
    • https://site-1043939.mozfiles.com/files/1043939/lawadisonuruzuf.pdfIn PDF document text
    • https://site-1037192.mozfiles.com/files/1037192/mozirevevapubife.pdfIn PDF document text
    • https://site-1036630.mozfiles.com/files/1036630/zupizebivomupuxetafip.pdfIn PDF document text
    • https://site-1037132.mozfiles.com/files/1037132/52210724538.pdfIn PDF document text
    • https://site-1040036.mozfiles.com/files/1040036/3241579289.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/9ef806fc-202d-4404-91a3-d97002ae087e/96694045523.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bda159c6-7568-43cb-8e15-194f09098e31/15556267383.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a6e23385-75aa-4231-804f-81418eb9353e/vatubake.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/eb739b74-c921-4b5b-b0ff-f44741032e65/nonab.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/909f52fc-b557-41c9-9aee-6be4e43a2f2c/vosozasoluporovo.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_off0000cebc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCEBC 4984 bytes
SHA-256: 7fa2c63ae24a42a6cfbcc06f30e483443b4c2aa188fde38624e6b680a8954517
font_01_sfnt_off0000dfb1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFB1 12264 bytes
SHA-256: 923394b0ee8c6214d2ceacaa0866960e41acf7dd4b50308b2f0a9b0ab13b953a
font_02_sfnt_off00010767.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10767 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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