Malicious PDF — malware analysis report

Static analysis result for SHA-256 38c8a701774726d7…

MALICIOUS

PDF

45.7 KB Created: 2020-11-09 00:11:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 2d1096064ad6913a9be06df1622e848b SHA-1: 2f685589b442ccf71ed89e2f132767bea3432d8e SHA-256: 38c8a701774726d77283b17746fda71676e0a35a55e8b3c82c9726ec339647e6
66 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains an embedded URL that, when clicked, leads to a download disguised as 'shadow box apk download'. The ML classifier strongly indicated maliciousness, and the presence of numerous external links suggests a link farm designed to obscure the true destination. No scripts were extracted, but the document's structure and embedded URI are indicative of a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://traffking.ru/123?keyword=shadow+box+apk+download PDF link annotation
    • https://zuragani.weebly.com/uploads/1/3/1/4/131438510/1540784.pdfIn PDF document text
    • https://towetebofipu.weebly.com/uploads/1/3/1/4/131437669/6303076.pdfIn PDF document text
    • https://gujodoludota.weebly.com/uploads/1/3/2/6/132681740/7488526.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://beziduxonet.files.wordpress.com/2020/11/nerf_cutan_latral_de_la_cuisse_dou.pdfIn PDF document text
    • https://mopuxupu.files.wordpress.com/2020/11/19764246295.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3aa85c49-1161-4265-a3bd-54b5c3c77092/jajugivupomivofu.pdfIn PDF document text
    • https://s3.amazonaws.com/nabifovu/pafimerilinatevemuvem.pdfIn PDF document text
    • https://s3.amazonaws.com/bupaxomu/chevrolet_captiva_service_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/tometubufimopim/gukijipudixulo.pdfIn PDF document text
    • https://bajalafel.files.wordpress.com/2020/11/windows_10_user_guide_for_dummies.pdfIn PDF document text
    • https://s3.amazonaws.com/ragejufa/60504755149.pdfIn PDF document text
    • https://s3.amazonaws.com/rokuwapesu/skyrim_se_belt_fastened_quivers_not_working.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/46c90cc5-36ad-4991-8c14-6909e929579e/5_ejercicios_resueltos_de_principio_de_pascal.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005c2e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5C2E 5240 bytes
SHA-256: f5aaf37c93613c389120d013a3c99001099f03f5f4cb2145e7cd97638ccd3d73
font_01_sfnt_off00006e0c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6E0C 12080 bytes
SHA-256: d1bd3d5a3d6bf8e9ccb6ceae7db706bfd6c1c0259710da37520a8bfd1dccbfaf
font_02_sfnt_off0000953e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x953E 16092 bytes
SHA-256: 9af6fc3bf9d751f70540aea0fa47faa159a3604992cda23d2adcda3ffc5346b2

Open this report in the interactive analyzer, or submit your own file for analysis.