Malicious PDF — malware analysis report

Static analysis result for SHA-256 db21ac052bc0ee22…

MALICIOUS

PDF

44.8 KB Created: 2020-11-08 09:56:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-11
MD5: 5a2ec0bc78c4265c4601972c8de4ed59 SHA-1: c4b593748ecde518ff5200560cb53d90f3b85e9b SHA-256: db21ac052bc0ee22cd6c9d4a3ded2c46590f57ee9f9212aca3e55f364d438282
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://traffine.ru/aws?keyword=wayne+dalton+idrive+garage+door+opener+manual In PDF document text
    • https://folemazilepi.weebly.com/uploads/1/3/1/1/131164248/ragejese.pdfIn PDF document text
    • https://dirigesibujov.weebly.com/uploads/1/3/0/9/130969991/gusixolatigovuzap.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4457561/normal_5fa51eec1874d.pdfIn PDF document text
    • https://pejopazuzaguwoz.weebly.com/uploads/1/3/2/8/132815183/namukojitobewa-zafodexazota.pdfIn PDF document text
    • https://wegotutitupal.weebly.com/uploads/1/3/1/4/131453182/4997439.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392470/normal_5f9c424325abd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380393/normal_5f9975a836f65.pdfIn PDF document text
    • https://gamorajemusuro.weebly.com/uploads/1/3/4/3/134316050/185de0c6ab9113.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://xewuripew660320655.files.wordpress.com/2020/11/zewaxu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b7765d1f-826b-44a8-812c-daab3f86dd1f/25162364025.pdfIn PDF document text
    • https://fefitaw.files.wordpress.com/2020/11/64939725781.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/15d04a97-f64c-4521-877b-ee4dce125951/xetavagotusepiparipezupug.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cf82c09e-b64a-48bf-a966-a3e1861ba239/64927677453.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/93f93132-8182-4177-a3f5-87c240da4aa5/do_fleas_fly_or_hop.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_off00006d7e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6D7E 5276 bytes
SHA-256: 340bc929a0f1fb0554c1e4492101a73a322720b59f8b9a6762c53a702b4d7e60
font_01_sfnt_off00007f76.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7F76 11376 bytes
SHA-256: 174a733b6acf3121ca999816892e9670961cb7992fbbb470277cbb847be39ab9

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