Malicious PDF — malware analysis report

Static analysis result for SHA-256 0935c54e8654fdb7…

MALICIOUS

PDF

39.3 KB Created: 2020-11-04 08:12:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: cb9cee0b6aa430bd6aca09052f5c7727 SHA-1: bc8256e94fb40fbc6695e11132cccfdbfdc222d6 SHA-256: 0935c54e8654fdb7d7f2909000dd133372075c8ee71c6872ff3d74f8984f76fb
124 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains embedded URLs, with one specifically identified as a malicious redirector. The document body, though heavily obfuscated, appears to contain the same malicious URL. This suggests the file's primary purpose is to redirect the user to malicious infrastructure, likely for further exploitation or phishing. No scripts were extracted, and the family is undetermined.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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 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.
  • 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/aws?keyword=20th+century+fox+home+entertainment+logo+2006 In PDF document text
    • https://mupibidegupek.weebly.com/uploads/1/3/0/8/130874042/lebatarebi.pdfIn PDF document text
    • https://xelefivaj.weebly.com/uploads/1/3/4/2/134234850/vumolefaf.pdfIn PDF document text
    • https://beperiguvo.weebly.com/uploads/1/3/4/3/134320750/7820598.pdfIn PDF document text
    • https://kufazijofiw.weebly.com/uploads/1/3/0/7/130776126/a7945.pdfIn PDF document text
    • https://movidotibapokab.weebly.com/uploads/1/3/4/2/134265591/1953546.pdfIn PDF document text
    • https://luvikexixof.weebly.com/uploads/1/3/4/4/134481561/2443789.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/nopomewegobij/asymptotes_solved_questions.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/11304195-ee0c-4055-97a0-23bb5a039d25/50389093082.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bfe759e5-d93e-4ebb-81e9-ebe830b62f1c/63270338249.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f265abc3-0100-4048-9b9f-d305c7cb2652/lunifizufaxubeludila.pdfIn PDF document text
    • https://s3.amazonaws.com/widiku/sea_fog_pantone_color.pdfIn PDF document text
    • https://s3.amazonaws.com/rujimidujek/rodikibofuma.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_off00005a99.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5A99 5620 bytes
SHA-256: 3fd27be67b51598650f58bf27a78aff959c143b94a677ed349bbab59d8b2d046
font_01_sfnt_off00006da0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6DA0 10132 bytes
SHA-256: 3a53655d308cad15095aaed237f4972d7a5d217ebdc569792615e4b99c6c70c6

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