Malicious PDF — malware analysis report

Static analysis result for SHA-256 9087e2419f78cc24…

MALICIOUS

PDF

43.8 KB Created: 2020-11-03 12:57:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 500a3b2dd0a29deefeca05d223c1ecfe SHA-1: effa9a56795ffffd65fb9d529bf462d7f50039e3 SHA-256: 9087e2419f78cc24f95ffbc0bdafd0f27737201d317fce180cc8e53a3d376fad
154 Risk Score

Malware Insights

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

The PDF document contains a large number of embedded links, many of which point to potentially malicious redirector infrastructure or link farms. The document body, though obfuscated, contains a URL that appears to be part of a lure. The presence of numerous external links suggests an attempt to redirect the user to malicious content, likely for phishing or malware distribution.

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=mk11+scorpion+spear+in+krypt In PDF document text
    • https://bijifejutumaxob.weebly.com/uploads/1/3/1/3/131381781/raxefesa.pdfIn PDF document text
    • https://sofakixejiz.weebly.com/uploads/1/3/4/2/134265497/8fdc70108a3bf7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370055/normal_5f8f6718a110c.pdfIn PDF document text
    • https://buxiniti.weebly.com/uploads/1/3/4/3/134309366/gutefo_lepada_gumimezinutelo_pomirovasogaxe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365636/normal_5f874c40e2398.pdfIn PDF document text
    • https://penopetidurip.weebly.com/uploads/1/3/2/8/132815040/karasupav.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413465/normal_5f9b7ff68efa6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374698/normal_5f8b60567825d.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://s3.amazonaws.com/davolazupivowi/zawitotonibotata.pdfIn PDF document text
    • https://s3.amazonaws.com/subud/40216965553.pdfIn PDF document text
    • https://s3.amazonaws.com/fibesezati/tawutim.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/473c94b4-4959-4a6d-8d4a-e286f4e3810a/80019321953.pdfIn PDF document text
    • https://s3.amazonaws.com/zafaronivaj/gravity_falls_cipher_wheel.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9502cf83-6f0c-4566-bbd4-d31bcd8c070c/21213694394.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0500/2189/2262/files/pitekuxizobabebopuluwe.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_off000060dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x60DC 4908 bytes
SHA-256: 57977685d3062f7587c852f020221a7f2e95218618efd79f2fe440a0e19c1818
font_01_sfnt_off000071a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x71A3 10140 bytes
SHA-256: 66ea46c4cc89459f5b16d3e20acb319963364653100896e26721d85871847958
font_02_sfnt_off0000944e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x944E 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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