Malicious PDF — malware analysis report

Static analysis result for SHA-256 118a2aad74a04998…

MALICIOUS

PDF

47.3 KB Created: 2020-10-29 23:55:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 156b90a6d3a0800fae1983f66b20015e SHA-1: 21b48942a69e4415e3c4577329813b539ca77353 SHA-256: 118a2aad74a04998647dd46cde8c052ddbef01468b69656ab843b313dd6fe4fa
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://cctraff.ru/aws?keyword=bdo+is+organic+food+worth+it In PDF document text
    • https://dimaxafazeza.weebly.com/uploads/1/3/1/4/131453031/safado-fodidunixoso.pdfIn PDF document text
    • https://kanudepu.weebly.com/uploads/1/3/2/7/132740929/dabezirijufon-lafabipadafipiz-radeko-mevubajofok.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403533/normal_5f94a8570891a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387703/normal_5f9127f30f107.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/1/0504/5852/5889/files/tebaruw.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0501/1999/9645/files/idiots_guide_to_american_football.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0485/7951/0432/files/cooking_italian_with_joe_braciole.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/844e9007-c2db-4b84-8bf8-411619b946e6/jebefemobel.pdfIn PDF document text
    • https://s3.amazonaws.com/henghuili-files/43162805903.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/875c2629-00f4-495d-8c78-3c83c5848391/65299329217.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/44884d5f-2150-4d0e-8619-6675b33471c7/wupuxiwuxizelo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/950b1a83-192c-4e2f-abec-f43110c8dbe7/hersheys_special_dark_chocolate_bar_cocoa_percentage.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_off00006c2c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6C2C 5064 bytes
SHA-256: 94b8a001d46e4b3c88b37074d55279f7da4b14ede8d48bc51bc76f8c723af98d
font_01_sfnt_off00007d6a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7D6A 11236 bytes
SHA-256: 7ae257e56622dd7368b4a080d481f60c372a700bfc8e6a41071274494d00a749
font_02_sfnt_off0000a285.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA285 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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