Malicious PDF — malware analysis report

Static analysis result for SHA-256 bc8f637a7c1cf87f…

MALICIOUS

PDF

39.5 KB Created: 2020-04-03 11:08:39 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6) First seen: 2020-12-25
MD5: e853bba86a3844061bbdfd419c3781a4 SHA-1: cbc699bd43644ea3c5073736e07b2d5ce1a08d93 SHA-256: bc8f637a7c1cf87f0e8b42706ac5ab3bbf0a595fa84e217c7eda744a61359bdd
104 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • 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
  • 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 http://msgarletts-hancock.com/uploads/1/3/0/7/130776490/130776490.html#ccsf+spring+2019+schedule+of+classes PDF link annotation
    • http://westwoodcondos.com/uploads/1/3/1/3/131384778/bf77b38c.pdfIn PDF document text
    • http://www.sulumorbusinessservices.com/uploads/1/3/0/9/130969153/e27544a6ee24.pdfIn PDF document text
    • http://t3customdesigns.com/uploads/1/3/1/4/131438729/66f5a9b6de9f19.pdfIn PDF document text
    • http://rpentertainment.net/uploads/1/3/0/6/130604141/sanovi.pdfIn PDF document text
    • http://levibhistory.com/uploads/1/3/1/1/131164481/xudemuf.pdfIn PDF document text
    • http://peakconditioningandfitness.com/uploads/1/3/0/6/130620950/kifibokuzen-wivojufed-gijusab-dabavegijix.pdfIn PDF document text
    • http://pgadoptions.org/uploads/1/3/1/3/131380288/nojugujizavapopofipa.pdfIn PDF document text
    • http://binghaoy.com/uploads/1/3/1/3/131379671/cc0c7d3.pdfIn PDF document text
    • http://stewardbouwsupport.nl/uploads/1/3/0/7/130775629/0f21485cb003c.pdfIn PDF document text
    • http://tiffanybeaudin.com/uploads/1/3/1/4/131410479/litikigowepak-fowebobe-dudumududaxa-xisukop.pdfIn PDF document text
    • http://gr8nessent.com/uploads/1/3/0/7/130739887/dokak.pdfIn PDF document text
    • http://jerrylinovo.com/uploads/1/3/1/4/131438161/603ae4c.pdfIn PDF document text
    • http://goodwillvietnam.com/uploads/1/3/0/7/130775422/c9fcb0f73bf.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

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007081.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7081 7940 bytes
SHA-256: e37692a7665d12fbf1b898b44f290fabdfdbf6939bef1537895abda8d1398d04

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