Malicious PDF — malware analysis report

Static analysis result for SHA-256 56ed1c2837912974…

MALICIOUS

PDF

44.0 KB Created: 2020-10-30 10:06:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 7ca2e282ce49a4e63f4364a0c0ea1a80 SHA-1: bb7a0c13ad747d933aafc15d124dbe98857fe955 SHA-256: 56ed1c28379129745ff5fc2402a809b4a038400ca707e9a362c08ce4079e90b2
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/aws?keyword=andrew+jackson+personality+type In PDF document text
    • https://lupexepiw.weebly.com/uploads/1/3/4/3/134318885/2280249.pdfIn PDF document text
    • https://fejamelaluboj.weebly.com/uploads/1/3/4/3/134311679/4fa8d1.pdfIn PDF document text
    • https://vaxajiwozoli.weebly.com/uploads/1/3/1/6/131637631/7482988.pdfIn PDF document text
    • https://nipaxibovaj.weebly.com/uploads/1/3/1/3/131379211/tejebabeni-nesevofowafejo-gulufasobeger.pdfIn PDF document text
    • https://pudegubazamase.weebly.com/uploads/1/3/1/1/131163945/gewupefamesuba.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365652/normal_5f8ca9659b127.pdfIn PDF document text
    • https://derodaju.weebly.com/uploads/1/3/1/6/131606282/38b26bf5443.pdfIn PDF document text
    • https://saxibodusazo.weebly.com/uploads/1/3/0/7/130740440/zafubame.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://cdn.shopify.com/s/files/1/0502/2033/5273/files/39960006485.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0477/0119/6966/files/digraph_ck_worksheets_free.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0501/5247/2764/files/the_high_school_survival_guide_free.pdfIn PDF document text
    • https://s3.amazonaws.com/varolexexus/sepia_tone_photoshop.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0501/4873/7194/files/kodanizigaf.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_off00005fc9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5FC9 5176 bytes
SHA-256: 63e11508839c02099088d01ac4b25ca744910dfbd8de3ee7f2fada86386d05fe
font_01_sfnt_off00007185.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7185 10568 bytes
SHA-256: 44f8d22b400c58ce2f444ca4cfe7cbdfc6cfbe7d78d206a460921d8c44cdfb8c
font_02_sfnt_off00009577.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9577 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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