Malicious PDF — malware analysis report

Static analysis result for SHA-256 47b8ef8471cd7648…

MALICIOUS

PDF

40.2 KB Created: 2020-10-04 02:31:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 7b26bc5612a8eb8eee4358d734f7eb01 SHA-1: b215e32426845da9a007e83c067d5d95a3701b00 SHA-256: 47b8ef8471cd76482ee746edb0207e86450a4c826f556f959ad3b80131f0f931
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic firing for a PDF link farm and another for a malicious redirector. The document body, though garbled, contains text related to a 'mantra mp3 free download' and the malicious URL, suggesting a lure for SEO poisoning or phishing. The presence of embedded URLs and the nature of the heuristics strongly indicate an attempt to redirect the user to malicious infrastructure.

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 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://ggtraff.ru/strik?keyword=swayamvara+parvathi+mantra+mp3+free+download In PDF document text
    • http://sajivu.harrisendofthetrailranch.com/uploads/1/3/1/1/131163635/652d43d4ec.pdfIn PDF document text
    • http://files.nowandzenyogawc.com/uploads/1/3/0/8/130814076/40e522d13fb68a.pdfIn PDF document text
    • http://rezuw.imagesstratford.com/uploads/1/3/2/8/132815014/kakomobawil.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/9745e7e5-ee76-4256-bd05-8d72540f54c5/vojekeditoded.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d79d3dea-85c4-440c-8cd7-e937192c75e0/7354633415.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/aaf7b620-9fa1-42fd-8097-65869b80cb5a/jemawosubotoxebuwawasuguk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fc6e26d0-77bc-4dbc-9c7e-5d529fdc76bd/nusikapupawege.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a8344d20-379f-440f-ba7f-47eadafd9e51/58479043777.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0cca94be-5186-4467-8e9e-c61f96677974/kujuluxidano.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/703c5768-6ced-4fe3-a32c-50f745156fcd/35115112233.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bf6367dc-fdb3-43b7-9327-50197256d829/xonifedoreturomatazogo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6fd2b514-978f-4986-81d7-27d58cee2899/zamageladonefomu.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_off00005d7e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5D7E 5624 bytes
SHA-256: 985df80a35e1b0793c9291b49b5fb340501854445dc9d1bf89283a177173192e
font_01_sfnt_off00007099.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7099 10492 bytes
SHA-256: 612ff7dedb674dfeec3e6656777283bce89c3a1d9e5a5fb3131faea049ec1871

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