Malicious PDF — malware analysis report

Static analysis result for SHA-256 a5a2b4a4f8bfe241…

MALICIOUS

PDF

67.0 KB Created: 2020-10-16 05:54:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-17
MD5: 2c333dfbf48d7906f7e94f50908d2d82 SHA-1: 9bb088852c6c568f6df7c99069743ad9703f30b3 SHA-256: a5a2b4a4f8bfe241b6785246437e0d7bd31050294280878acdeba5e9b05ac03b
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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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/123?keyword=asra+guidelines+for+neuraxial+block In PDF document text
    • https://sabidodavo.weebly.com/uploads/1/3/1/4/131408103/2915921.pdfIn PDF document text
    • https://varipejat.weebly.com/uploads/1/3/0/7/130739080/7598612.pdfIn PDF document text
    • https://juragubiv.weebly.com/uploads/1/3/0/8/130874328/velukuziralijomem.pdfIn PDF document text
    • https://dimaxafazeza.weebly.com/uploads/1/3/1/4/131453031/zakeme.pdfIn PDF document text
    • https://tabuxeniki.weebly.com/uploads/1/3/2/6/132682737/vusikebujakixem.pdfIn PDF document text
    • https://zafozudakajadev.weebly.com/uploads/1/3/0/8/130814863/kuwekewugi.pdfIn PDF document text
    • https://fifowekuvepu.weebly.com/uploads/1/3/0/7/130776735/19e36863b3c6c.pdfIn PDF document text
    • https://buxivadoga.weebly.com/uploads/1/3/0/7/130740323/tatazidikono.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/ffc916fe-e5e6-4557-92c0-4d410d8f841f/63947460195.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d74be55c-55e4-4d7f-8be1-32ad3c60b96b/89057845389.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/61b47604-7d95-47d6-9254-c50936acaf57/24488074740.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/41e6b7ce-2075-4d18-96ab-46f6c5f18b12/15415834583.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/62931d2b-c121-4954-988b-b877c4921132/bokirodoximerigul.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a39bda1a-a93e-4f72-a0ee-52a90081c2f0/vofuvikopude.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d2f4d1ca-743b-4e23-96a2-cc480249448a/xoxekejolo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/db6156fb-c922-42ba-a50a-f34624a98b6c/furof.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7ac2fd4d-ed1a-44ce-aba8-89d4bae390f4/rowonabitodokebadose.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9172aa71-89b1-44ad-8f41-adf37190ab3b/sedago.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e15a6cf7-d7ab-4042-9df3-3fb4a5a4f745/nigubax.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/33fbd44f-83e6-40a4-975b-b66a54a51a61/78347429423.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c7be3b63-9cfa-43d0-9205-a3fa9153a770/1092674381.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_off0000b1b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB1B3 5252 bytes
SHA-256: 1e790a55f3fd4af53b598ccc820162654da97d73b32dc4eb27916902857278d7
font_01_sfnt_off0000c396.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC396 14492 bytes
SHA-256: 58857fd2bc89aaaf3ea5118dc807c4bea94077e64e6bde1f66ce3e78cd4dd733
font_02_sfnt_off0000f049.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF049 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333