Malicious PDF — malware analysis report

Static analysis result for SHA-256 9fd125ecb8fb62ba…

MALICIOUS

PDF

94.0 KB Created: 2020-12-24 21:26:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: ff65632e3e4a481b045df7cb2f28932b SHA-1: 7853e6a945f8bbf73a4522fabe096de4e6fb4aed SHA-256: 9fd125ecb8fb62babe24a00a135b68942f6b68f2ebf82fc69a26f9501a3325dc
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains multiple embedded links, with one identified as a known malicious redirector. The ML classifier also flagged the PDF as malicious with high confidence. The document body appears to be obfuscated or corrupted, but the presence of a malicious redirector URL strongly suggests an attempt to lure the user to a harmful site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • 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.
  • 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/strik?utm_term=the+edge+of+democracy+sundance+review In PDF document text
    • https://nulabelavomeviz.weebly.com/uploads/1/3/1/4/131413951/rugolidejenomabo.pdfIn PDF document text
    • https://noxutepobop.weebly.com/uploads/1/3/4/5/134510102/kofavivudol.pdfIn PDF document text
    • https://zuxuzesis.weebly.com/uploads/1/3/1/4/131438019/sekinup.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/652dbbe9-9be4-40c2-868b-e6059e84345a/88840420891.pdfIn PDF document text
    • https://s3.amazonaws.com/davawina/guitar_beginners_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/462b7a8f-b707-4276-84c8-bd3d8bfa8de3/cant_is_not_an_option_nikki_haley.pdfIn PDF document text
    • https://s3.amazonaws.com/jitimesolagun/newomosufadobusixanepin.pdfIn PDF document text
    • https://s3.amazonaws.com/xirixepo/menu_costing_spreadsheet.pdfIn PDF document text
    • https://s3.amazonaws.com/wozoxub/juvoninosenuwetipawowod.pdfIn PDF document text
    • https://s3.amazonaws.com/towakog/koduzaripigivak.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b02c5dc7-68e4-49ad-8bdb-5f9327bfa6bb/placa_me_positivo_pos-eih61ce_manua.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_off00012d3c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12D3C 5608 bytes
SHA-256: 2d43b9c3f04813a4017f367a4ef98e3b9e3889a824f771d64bc4efb7ed767308
font_01_sfnt_off0001403d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1403D 13572 bytes
SHA-256: d85ddad3e08fa3b7817b1ca7b0172018a7ff756aa7fcfc65627c4f37ce9618c6

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