Malicious PDF — malware analysis report

Static analysis result for SHA-256 5242e31ba6d0a248…

MALICIOUS

PDF

38.4 KB Created: 2020-11-06 23:26:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: fc9d084091713d188b1c71cd847172ae SHA-1: e0c47b1d6accced1c8534ea5eabbd656fe05d83e SHA-256: 5242e31ba6d0a2483e31679a6d9cbf589aad8f7bac09478115c1aafcaca907c7
184 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 pointing to disposable hosting services, and at least one link to a known malicious redirector. The document body mentions 'Minecraft pe 0.2.0 apk download', suggesting a lure for users seeking software. The presence of numerous links and a malicious redirector indicates an attempt to drive traffic to potentially harmful sites, likely for malware distribution or phishing.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • 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/123?keyword=minecraft+pe+0.2.0+apk+download In PDF document text
    • https://wujibinofowe.weebly.com/uploads/1/3/1/3/131383737/dovirewelafoni_kepuk_kepuxelam.pdfIn PDF document text
    • https://lepitosamodovax.weebly.com/uploads/1/3/4/3/134335454/a294722281c4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407733/normal_5f9248913cc8d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413004/normal_5f9945e60e596.pdfIn PDF document text
    • https://biwugina.weebly.com/uploads/1/3/1/1/131163984/sewonosorunobaluj.pdfIn PDF document text
    • https://gokipeko.weebly.com/uploads/1/3/4/3/134351508/8fe3966345.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370288/normal_5f8e0cffcb5e8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379971/normal_5f95fd018977e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416665/normal_5f9ec2165a3dc.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://riroxoposej.files.wordpress.com/2020/11/fopidotazosaxom.pdfIn PDF document text
    • https://zipexazoti.files.wordpress.com/2020/11/rojavunemojanosexo.pdfIn PDF document text
    • https://sorogigavid.files.wordpress.com/2020/11/jotubijibamutut.pdfIn PDF document text
    • https://kebupud.files.wordpress.com/2020/11/16674380217.pdfIn PDF document text
    • https://suvarofora.files.wordpress.com/2020/11/lodebukiworidu.pdfIn PDF document text
    • https://dejubanev.files.wordpress.com/2020/11/ziwibu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d588de0f-9edf-4942-b3fd-684a21436e33/assured_muscle_rub_gel.pdfIn PDF document text
    • https://fidunonip.files.wordpress.com/2020/11/madelizopididam.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_off0000570f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x570F 5440 bytes
SHA-256: bbe735effc9fac418ffa835d63f74562099c518e41ced01ae3dfa859e323a306
font_01_sfnt_off000069ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x69CA 10216 bytes
SHA-256: d0dfae273b71dd3f46a18196eac9a9663f98c60f47879d582898fe9a8ad36bac