Malicious PDF — malware analysis report

Static analysis result for SHA-256 bb8f2a426dfddf5d…

MALICIOUS

PDF

45.3 KB Created: 2020-11-02 09:11:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-02-09
MD5: ac3ca952cfb8f9d4459141bdea651498 SHA-1: d9e9259e4ecb024bde923bfacd823eef4fd0f088 SHA-256: bb8f2a426dfddf5d835fa9eefa14e27b1a686483c662fffe04e9b51d8d5722dd
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.cc/123?keyword=fogponics+grow+systems In PDF document text
    • https://mujonutuxow.weebly.com/uploads/1/3/4/3/134336111/e280f5a4.pdfIn PDF document text
    • https://vigejudekoseja.weebly.com/uploads/1/3/4/5/134518300/wodifuju.pdfIn PDF document text
    • https://xizidalubatud.weebly.com/uploads/1/3/4/5/134583516/giwem.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369774/normal_5f9b60be16d41.pdfIn PDF document text
    • https://repafajekojila.weebly.com/uploads/1/3/4/3/134305679/a1e81302cba86.pdfIn PDF document text
    • https://nipaxibovaj.weebly.com/uploads/1/3/1/3/131379211/f6293.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/f01ff48e-eef7-4bdd-80a3-6ae5b405d422/savalugenazagawuxa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/27fd3a2f-429e-4205-8730-0ba7cbbaa9fd/gukitodiguvixalotofemol.pdfIn PDF document text
    • https://s3.amazonaws.com/gexixixuda/gun_mayhem_1_player.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4a2ba0e5-77f0-4703-90e6-d8359ef05181/zutotutonogizixajegam.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0bd6dff1-e285-44d3-ae23-59b81810e1a6/lefawebadiwe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dd829ef8-594f-4aed-8308-e08f381a51b9/wu_tang_sword_style.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/41851408-1478-44d4-a012-0296c6c97058/39515644657.pdfIn PDF document text
    • https://s3.amazonaws.com/vonuxagupeduze/82710844709.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a2178013-30f2-4500-91b9-9f4891f4c251/64263338581.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_off00006e65.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6E65 5160 bytes
SHA-256: d7bd07e5ef51da37a4a4aca9ef996ab0c6995642c3318092d11c53d909c2c20c
font_01_sfnt_off00008008.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8008 12188 bytes
SHA-256: c99a1cbf7d643b722a0e1616758520b19fb7a8945d6c14d364b8189f4362f00f

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