Malicious PDF — malware analysis report

Static analysis result for SHA-256 d9d9e4d7a023f8e4…

MALICIOUS

PDF

65.8 KB Created: 2020-11-03 01:08:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: 2790e83ece5737ebb74eace2b4bbad7e SHA-1: d2e81dd4567fd3c55507cdd29d9c5252bc239309 SHA-256: d9d9e4d7a023f8e48ca9a2a13091eeef67679c5b0e9b3ba6f22f91d333041e72
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://ggtraff.ru/123?keyword=pikachu+moveset+gen+3 In PDF document text
    • https://cdn-cms.f-static.net/uploads/4375197/normal_5f9dd988a7e2a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368235/normal_5f89a726b9b1a.pdfIn PDF document text
    • https://xesaranit.weebly.com/uploads/1/3/2/6/132696194/jorivoridot-sezosatexe-mofon-loxow.pdfIn PDF document text
    • https://gizumefelaz.weebly.com/uploads/1/3/4/3/134318195/f8c11e85.pdfIn PDF document text
    • http://www.opentle.orgIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0266/7783/7997/files/conducto_deferente_anatomia.pdfIn PDF document text
    • https://s3.amazonaws.com/napisakaluja/87856680943.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a2e81eb2-f3d2-4e95-93f0-b6b56deafbe9/gezeriseje.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0a9e4c15-134a-4f94-89b9-fa67e2de31ad/85332818780.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/04148b76-ebe2-46b8-afb6-6412bd8a4765/up_town_funk_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/952eb95e-26d8-4b59-b38d-f602aed0086d/muzadem.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0eff857c-3431-4743-9d35-5822d91c4c06/xoranopafam.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ef83b42b-06ad-4894-8031-ef842e90714d/lenekunewovagekivusum.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e0b479a4-b68d-45fe-a77e-928f31aa9fab/zalizeda.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://www.gnu.org/licenses/gpl.htmlIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_006_off0000b884.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0xB884 7648 bytes
SHA-256: 7e09b314a50e130668a343a249e19fe6accfb92426d6f372728b40885126b308
font_00_sfnt_off00005d8e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5D8E 22980 bytes
SHA-256: a2725e48751af7bf591c8a41d3ecf9ee68c93f45d16e162bf8f656121ebf0a09
font_01_sfnt_off0000a656.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA656 5372 bytes
SHA-256: 10cfe31def63bb7be5c77332710f290f1e883ee1e339149aa09973176c38363f
font_03_sfnt_off0000cd77.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD77 13628 bytes
SHA-256: ba9f4cba5828edb0f353421467cd160e3979efb7111acfca52696c7801224743

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