Malicious PDF — malware analysis report

Static analysis result for SHA-256 cd282be9ed483405…

MALICIOUS

PDF

45.3 KB Created: 2020-10-26 10:39:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 5ce67b1c185c79d2a9bf8fde24de0919 SHA-1: 321e6f3e808721d9329da78ec9f8108e3daecd53 SHA-256: cd282be9ed48340529711ffce5d67b24d67df659444c975e865903af282431d2
162 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a critical heuristic firing for a malicious redirector link, directing users to a URL associated with 'clash of magic s4 apk download'. Additionally, it features a link farm of numerous PDF files hosted on S3, suggesting an attempt to manipulate search engine results or distribute content. The presence of a visual download button further supports the lure to click the malicious link.

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://ttraff.me/123?keyword=clash+of+magic+s4+apk+download In PDF document text
    • https://bewupoterefi.weebly.com/uploads/1/3/1/3/131380107/8d9cf66eb80bc8.pdfIn PDF document text
    • https://nitetezelimon.weebly.com/uploads/1/3/1/4/131438651/gedeseridavi-bukegopiloluk-fezod-lixaxun.pdfIn PDF document text
    • https://vikumeniwexawud.weebly.com/uploads/1/3/0/9/130969440/d7dfa3bc38dcb.pdfIn PDF document text
    • https://koxoganonigowup.weebly.com/uploads/1/3/1/4/131408343/801ac33.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366388/normal_5f87b75755acf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366009/normal_5f8bbaa865f7e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378848/normal_5f8a9abf1cf02.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/leguvefu/asa_anesthesia_classification.pdfIn PDF document text
    • https://s3.amazonaws.com/xakapudakadu/wodaf.pdfIn PDF document text
    • https://s3.amazonaws.com/garorowa/upkar_psycho_book_download.pdfIn PDF document text
    • https://s3.amazonaws.com/vixuwogetiv/add_crop_marks_in_photoshop.pdfIn PDF document text
    • https://s3.amazonaws.com/memul/dungeons_and_dragons_5th_edition_character_sheet_fillable.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2de334bc-a6eb-4ec4-82c9-20d2d4677014/nuwegozovudavumot.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/48c61e26-aff7-4967-ab89-e0000f14d00a/23228844063.pdfIn PDF document text
    • https://s3.amazonaws.com/xipavir/luzududotavijefajukuziku.pdfIn PDF document text
    • https://s3.amazonaws.com/jemazejodep/43768399625.pdfIn PDF document text
    • https://s3.amazonaws.com/kavitokolezub/fotuliwoxudavisetowe.pdfIn PDF document text
    • https://s3.amazonaws.com/lewuli/lados.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_off00007084.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7084 5624 bytes
SHA-256: a0298a74127caa0ce8a53977b6e835a512f685217ed855cb65c63281a7cfe4f6
font_01_sfnt_off000083a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x83A2 10800 bytes
SHA-256: c01115bde04e4cc955ca9bf7d4dc12fd5464e8ffdc2d01605b12341d1112f767

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