Malicious PDF — malware analysis report

Static analysis result for SHA-256 b6dba587b70f523c…

MALICIOUS

PDF

55.0 KB Created: 2020-10-19 00:42:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 1d9a032d8fdfe703ecb07f50990f24b7 SHA-1: 5327e9de4c8bc637ebdf62005e39360872371859 SHA-256: b6dba587b70f523cf47c531f2a4c315176541cea94ed707dc5c1709956e47499
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=xiaomi+mi+pad+2+windows+to+android In PDF document text
    • https://gepobuxew.weebly.com/uploads/1/3/1/0/131070920/df480dbce3.pdfIn PDF document text
    • https://xetutinafo.weebly.com/uploads/1/3/0/7/130775845/xuruxukijisized.pdfIn PDF document text
    • https://viweposedijul.weebly.com/uploads/1/3/1/0/131070314/banosutafer.pdfIn PDF document text
    • https://roninuvanajeg.weebly.com/uploads/1/3/1/3/131379749/wazapovuxir_japojesele_vojuj_fememad.pdfIn PDF document text
    • https://repugonajipivup.weebly.com/uploads/1/3/0/8/130814926/7222755.pdfIn PDF document text
    • https://wipomozexabezi.weebly.com/uploads/1/3/0/7/130776841/xofasaladuf.pdfIn PDF document text
    • https://xebikazogede.weebly.com/uploads/1/3/2/7/132740990/28fef585a7.pdfIn PDF document text
    • https://mogidudurunupiz.weebly.com/uploads/1/3/2/6/132695636/69be8cfd.pdfIn PDF document text
    • https://gimejexoxixaza.weebly.com/uploads/1/3/1/8/131872185/kirorafagosox.pdfIn PDF document text
    • https://ziripovopibew.weebly.com/uploads/1/3/0/8/130874468/49064b6.pdfIn PDF document text
    • https://rudofodirofebas.weebly.com/uploads/1/3/0/7/130739781/vixixevumi.pdfIn PDF document text
    • https://runebipunozup.weebly.com/uploads/1/3/1/4/131406604/jajopikalo_lusov.pdfIn PDF document text
    • https://xusawoji.weebly.com/uploads/1/3/0/7/130739635/6229393bf04.pdfIn PDF document text
    • https://vedabigejiko.weebly.com/uploads/1/3/1/4/131438046/3503879.pdfIn PDF document text
    • https://dimaxafazeza.weebly.com/uploads/1/3/1/4/131453031/kezedivalo-bolumukejufufik.pdfIn PDF document text
    • https://xetutinafo.weebly.com/uploads/1/3/0/7/130775845/pekesadumukubiberu.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/6167f8e6-9ed3-49ae-aead-ed45559fa76f/82193489385.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9187ce5c-bbdd-4002-b9ab-8bd2c9d50c0a/banenovutanujux.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3035f29b-68a2-4fcb-8d98-4d9af21d3000/fubixenaduv.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6286a453-1a51-457f-a0a5-791acad7c2dc/mumepatugolulavatodu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9f4402a6-077c-4e4d-b26c-48074fcf98d1/68380096657.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2b619e59-38bd-42c0-b28e-7eca180427e2/79808749206.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f44474b9-a2ec-4823-9fff-4b2e15aa21a8/niximowukokagudadam.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/da4bd078-fcd8-4bce-bfd3-45c4b9eb5957/gugegi.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_off000096c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x96C3 5276 bytes
SHA-256: 385e12ebb8e0cbb8d108a63bedc0cf28112322b14af74e8d8c9890b1941a6b4d
font_01_sfnt_off0000a8ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA8AB 11008 bytes
SHA-256: a967c64ce8c56eb2db3b1b3d7151d89dd77261bc314217968e57a48598b633a5