Malicious PDF — malware analysis report

Static analysis result for SHA-256 ca5a12a107842899…

MALICIOUS

PDF

47.8 KB Created: 2020-10-16 03:30:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-19
MD5: 7c4964800f278476ca692a0655e5b8c7 SHA-1: 75fb4040bcff0bfa9fa635a2e2fe82eebbb3f098 SHA-256: ca5a12a107842899b62e810cc1961969d458badd14940713a5df5fdb744fa8c7
192 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=chrome+default+download+folder+android In PDF document text
    • https://cdn-cms.f-static.net/uploads/4366031/normal_5f870496577e6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369501/normal_5f87dbb67317b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369911/normal_5f88c04d889e5.pdfIn PDF document text
    • https://site-1042092.mozfiles.com/files/1042092/mopolenogabovanexejo.pdfIn PDF document text
    • https://site-1038940.mozfiles.com/files/1038940/12689760973.pdfIn PDF document text
    • https://site-1044259.mozfiles.com/files/1044259/84052547313.pdfIn PDF document text
    • https://site-1040766.mozfiles.com/files/1040766/43492358017.pdfIn PDF document text
    • https://site-1037889.mozfiles.com/files/1037889/solugaromupogifuzu.pdfIn PDF document text
    • https://jezaxegare.weebly.com/uploads/1/3/1/3/131380636/zunomonatuzo_kemaxonizu.pdfIn PDF document text
    • https://sonilotosoj.weebly.com/uploads/1/3/1/3/131379329/sizafe.pdfIn PDF document text
    • https://rudofodirofebas.weebly.com/uploads/1/3/0/7/130739781/3234530.pdfIn PDF document text
    • https://jakedekokobara.weebly.com/uploads/1/3/1/3/131381480/fesixukorupu.pdfIn PDF document text
    • https://folarudivol.weebly.com/uploads/1/3/1/8/131871739/pitibowuxogetox.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368760/normal_5f87e186a6e98.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369653/normal_5f88be32df019.pdfIn PDF document text
    • https://pagofere.weebly.com/uploads/1/3/1/3/131398194/a8d00675.pdfIn PDF document text
    • https://walijogopabo.weebly.com/uploads/1/3/0/7/130776167/5245467.pdfIn PDF document text
    • https://legadiduzavof.weebly.com/uploads/1/3/2/6/132681829/6769752.pdfIn PDF document text
    • https://mixorone.weebly.com/uploads/1/3/1/4/131438240/8dcc55d.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/b16886e6-e305-410c-8bdd-feef2a2b3cbd/xerekones.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a4aff83b-e0ec-4c5a-ac24-d8d1c9316540/56673487706.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6ee905be-3cfa-4dfb-b012-882895151c36/6655321099.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/be25fe40-9765-4417-a289-1fda469a04eb/73487137365.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_off00006fdb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6FDB 4964 bytes
SHA-256: 4fa6419b13b98d96580685805e1f75524f4f7bb4e8f9879209b60002b814742d
font_01_sfnt_off000080a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x80A6 10168 bytes
SHA-256: 2e6a4c56d3890949d4fb0744f3ca1da80d6b4998376ab1e1dc4e0bc55ac47c66
font_02_sfnt_off0000a359.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA359 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333