Malicious PDF — malware analysis report

Static analysis result for SHA-256 98c3b64a2d07d0cf…

MALICIOUS

PDF

74.8 KB Created: 2020-10-31 03:49:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 78c996048f6ea1fba431ceef4b535546 SHA-1: 99bfadbce2c3598ae587450d63179bee3b5d0a5e SHA-256: 98c3b64a2d07d0cf86573ffdee7ff0c9962b9ba43d3018e78386e486e15a161c
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm and routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

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://ttraff.com/123?keyword=snow+leopard+tail+growtopia In PDF document text
    • https://fozidisevuxife.weebly.com/uploads/1/3/4/3/134356050/f1e50f3.pdfIn PDF document text
    • https://fejamelaluboj.weebly.com/uploads/1/3/4/3/134311679/4388198.pdfIn PDF document text
    • https://godadonalizubo.weebly.com/uploads/1/3/1/4/131437317/lejemaminudorava.pdfIn PDF document text
    • https://xifobosakup.weebly.com/uploads/1/3/2/8/132815359/d16a950206a.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/e79977d8-dc1a-4e88-80a0-ab8fef152bde/succeeding_in_business_with_microsof.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b31a3214-9d95-4727-a7e0-38831205cff8/pumafajudakujirafituteron.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/18ca0638-5a08-4bb6-87c1-c17dcb79fd1c/laketugozinejariti.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dbcec2b7-f128-4b56-8ec5-990e12abbb36/matplotlib_line_graph_with_dots.pdfIn PDF document text
    • https://s3.amazonaws.com/jafujasiwetid/livro_antes_de_partir_em.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/81ac0a13-4597-409c-8e32-afe37d802448/best_warhammer_2_mods.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fb89249f-61bc-4c70-a189-74711b0f16e6/wexepol.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/608f23a1-4df2-4daf-809c-33b8b493a7d8/zamofemavoxilome.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d543.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD543 4932 bytes
SHA-256: 40d974e269592610afd52b27529644e54830d8298d45a66397c68883fd607c0d
font_01_sfnt_off0000e61e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE61E 12636 bytes
SHA-256: 58809d05ae1196ed2667d0c1f687d458a3f2103d74fbe1814cd8ed0d6c7e18f0
font_02_sfnt_off0001100d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1100D 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

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