Malicious PDF — malware analysis report

Static analysis result for SHA-256 a5d7996ad79d287e…

MALICIOUS

PDF

70.3 KB Created: 2020-11-19 02:11:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 4c61a1991237766af2cfc00a85034480 SHA-1: 708b31bc31465f693d5a971345ce23a5e0cc0ea5 SHA-256: a5d7996ad79d287eacacf5914a94717c38fa065c43f33a9dbaa1214b711a8bb0
94 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector infrastructure, indicating an attempt to lure the user to a harmful site. The ML classifier also strongly flagged this PDF as malicious. While no scripts were extracted, the presence of a malicious URL is a high-confidence indicator of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 3

  • 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.
  • 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://traffmen.ru/123?utm_term=kate+spade+return+policy+covid In PDF document text
    • https://cdn-cms.f-static.net/uploads/4382966/normal_5faaba5e669d0.pdfIn PDF document text
    • https://jivexine.weebly.com/uploads/1/3/1/3/131380908/fotuzuxulabas-zemibafuvolu-piroxanipu-zifevapajop.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385415/normal_5fa7e1f2568b3.pdfIn PDF document text
    • https://guzejanum.weebly.com/uploads/1/3/4/6/134681017/6d4cb919f4ce3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450243/normal_5fa00c9d4881b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389804/normal_5f903a15f0125.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365586/normal_5faba4a3698df.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366987/normal_5f877362d286c.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/c2baeac2-42af-467d-8a70-2abec1d934eb/zorotuxovedebav.pdfIn PDF document text
    • https://s3.amazonaws.com/kisimujuk/79999941144.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7a07f4f2-4290-4e23-b2c4-edaa9b62384a/kalufemoleroj.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cda56fa3-5213-4145-9b3a-a817b765a20d/devisirukizijupoxotudejon.pdfIn PDF document text
    • https://s3.amazonaws.com/muxegeza/surface_pro_3_hdmi_adaptor.pdfIn PDF document text
    • https://s3.amazonaws.com/fotojipifuzitul/apuntes_de_instrumentacin_para_bandas.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7f8bcfbd-75b1-43a6-90fc-02caba16b699/nosulimobelurusuwo.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_off0000d633.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD633 5196 bytes
SHA-256: 2eb5699df83a3c7306a0bc5c5d55b686f3ef7431979860dba6efbb365ce70206
font_01_sfnt_off0000e804.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE804 10724 bytes
SHA-256: 468fd463ad4c9ae1e537c75f7261aedcb2c865ba0a473d33fbd5e71afdd258ef

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