Malicious PDF — malware analysis report

Static analysis result for SHA-256 fcbff6ce32204872…

MALICIOUS

PDF

45.8 KB Created: 2020-11-06 04:10:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-11
MD5: 99f91e76db9e3c80dc2c9708d80b0419 SHA-1: f7d95c507e53d1538e12d338d59c395081b5ab50 SHA-256: fcbff6ce32204872e0d7211bcc2e453f588fcaa8541f76538e5e4880e9a0ad71
166 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • Clipboard command execution lure high SE_CLIPBOARD_COMMAND_LURE
    Document tells the user to copy or paste clipboard content into Run, PowerShell, cmd, or another shell-like execution context
  • 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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://trafficel.ru/123?keyword=srttrail.txt+bsod+error+on+windows+10 PDF link annotation
    • https://sujajikozodes.weebly.com/uploads/1/3/1/3/131384638/34149.pdfIn PDF document text
    • https://xubuvene.weebly.com/uploads/1/3/1/3/131380433/pijuvanab-mojisi-nazogidaxudu-rozumano.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4422876/normal_5fa472fc8fb44.pdfIn PDF document text
    • https://dutitujazekap.weebly.com/uploads/1/3/0/8/130814390/1158663.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374009/normal_5fa48e035e462.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366302/normal_5f87c579dc0f4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368748/normal_5f8ebac56ce1c.pdfIn PDF document text
    • https://fijojonibiw.weebly.com/uploads/1/3/2/6/132681787/5058540.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367013/normal_5fa417e9d866a.pdfIn PDF document text
    • https://jusegopij.weebly.com/uploads/1/3/4/4/134480833/7190580.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376869/normal_5f8fd7b3e3a8e.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://cdn.shopify.com/s/files/1/0437/0608/9640/files/37422804668.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6720/2974/files/97580307607.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/64048608-69ad-473f-80ba-adb5994b3ab4/ta_main_claudio_capo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/29f63ba4-025c-40ef-83dc-3a6e3ced560d/d__d_books_5e_xanathars_guide_to_everything.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_off0000672a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x672A 5236 bytes
SHA-256: 90a02b24d70d7acc33e37ba88c804b39187cb4d83fd7f664126142de26b1fde2
font_01_sfnt_off00007912.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7912 10348 bytes
SHA-256: fb0ff0d2cfc31a80ac4509626122eb9f13699c36aad98dddb745c7575d5034e5
font_02_sfnt_off00009c13.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9C13 4324 bytes
SHA-256: 7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71

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