Malicious PDF — malware analysis report

Static analysis result for SHA-256 e5b7b5d0471facd2…

MALICIOUS

PDF

36.3 KB Created: 2020-11-08 00:14:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: f36a0bc91fe9dceb960ddec9ec574c0c SHA-1: 77a5f782461cda93254cd4d160090b3e98648d4b SHA-256: e5b7b5d0471facd295c34d4c9988ccaf640dadd25b87461f9782f7f3481eba00
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains numerous embedded links, with one specifically pointing to a known malicious redirector. The document body, though heavily obfuscated, contains text related to games and URLs, suggesting a lure to malicious sites. The presence of a link farm and a malicious redirector indicates an attempt to drive traffic to potentially harmful content.

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://traffine.ru/aws?keyword=kingdom+rush+unblocked+games+66 In PDF document text
    • https://didipovewefof.weebly.com/uploads/1/3/4/3/134306756/139ea4d537.pdfIn PDF document text
    • https://xovifare.weebly.com/uploads/1/3/4/5/134524114/7254507.pdfIn PDF document text
    • https://situnege.weebly.com/uploads/1/3/4/5/134578036/8061811.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446512/normal_5fa18d9fb2fb3.pdfIn PDF document text
    • https://wogijelagorezu.weebly.com/uploads/1/3/4/0/134096035/kadabasovugij_manegijibunidi.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/33f9d2dc-5d96-4ade-9d89-d46a1ff29923/47386527744.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/01eacf2a-ae6d-4a64-b98e-7e592ab3db5b/toluserowaxopigata.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ca298562-eb53-4907-8c47-ec2c435e7ffd/23105402512.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/30f36057-c84b-4a96-ab80-6e737eeae35f/12573771413.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a31d9f56-46fa-4509-9a09-21fb3eeef534/tubidy_video_mobil_search_engine.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/55d07418-ff47-4cfa-802c-1cb56f42d75e/63986192701.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f7c7800d-919b-44e7-8d48-9ce9781fe1f2/sipafadudir.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6b348bd5-9251-434a-a02e-63d6cefb5a7b/trivia_crack_hack_2019.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cf9da8ef-a89f-4204-9823-e9b8101677ef/44618836296.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a5e1e7ce-20e8-49db-98d2-0591c08e8eb7/41065297110.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_off00004fdf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4FDF 5680 bytes
SHA-256: 71b5a7cace3041f74619ea2eb5a5060c9a480158a870685c5f849c18c3239ca3
font_01_sfnt_off00006308.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6308 9852 bytes
SHA-256: 852bca30d1465943cfea205add0f44116985566c7553d0fd4efa24680c1b5aef

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