Malicious PDF — malware analysis report

Static analysis result for SHA-256 e29978a406798c3c…

MALICIOUS

PDF

52.5 KB Created: 2020-11-07 06:39:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: cfd0e1f4acb4052a8fdcf6f53a2f1d13 SHA-1: 72eb11e4a1a8f13c7a34151ff51f3db02bbf66a4 SHA-256: e29978a406798c3ccb932a8e8e3920d6af78ce5d9c70e9c7d08785e5be899e67
184 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged by a machine learning classifier as malicious. It contains a large number of embedded links, with one identified as a redirector to known malicious infrastructure. The document appears to be a link farm designed to distribute traffic to various external resources, likely for phishing or malware delivery. No scripts were extracted, but the extensive link farm suggests a malicious intent to lure users to external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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=rhode+gear+4+bike+hitch+rack In PDF document text
    • https://zabaruwizugode.weebly.com/uploads/1/3/4/5/134596412/ralemogekavuxinogo.pdfIn PDF document text
    • https://pejopazuzaguwoz.weebly.com/uploads/1/3/2/8/132815183/6576417.pdfIn PDF document text
    • https://nogegonimever.weebly.com/uploads/1/3/4/3/134340032/6869542.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://bomobaral.files.wordpress.com/2020/11/pericardite_etiologies.pdfIn PDF document text
    • https://sanujoworeso.files.wordpress.com/2020/11/74847116160.pdfIn PDF document text
    • https://xojomome.files.wordpress.com/2020/11/miwajemuruloxuzerokimo.pdfIn PDF document text
    • https://tezebotum.files.wordpress.com/2020/11/bryan_adams_all_albmleri_cretsiz_i.pdfIn PDF document text
    • https://tunobomuxi.files.wordpress.com/2020/11/fuvopexemazomapa.pdfIn PDF document text
    • https://rotadenig.files.wordpress.com/2020/11/82236523173.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/822f9717-b9ee-4e51-969c-a1a697cd9589/21_irrefutable_laws_of_leadership_free.pdfIn PDF document text
    • https://s3.amazonaws.com/wixamupelinere/somers_high_school_famous_alumni.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/23828bbb-b0b1-49df-be87-b9f65757da43/lifolananajisuwajabuso.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9ee14229-e184-4905-826d-e87af52c94bf/bukadune.pdfIn PDF document text
    • https://s3.amazonaws.com/belopudevuzuza/10889348558.pdfIn PDF document text
    • https://zukanowaboj.files.wordpress.com/2020/11/73603020373.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_off00008f42.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8F42 5288 bytes
SHA-256: e589a1b9965751fa7ffd4e1d1104a50a30023adb9029246d763144169d23cd81
font_01_sfnt_off0000a148.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA148 10640 bytes
SHA-256: 368b1f469381fba4813afba6510546f30d3ec78ca93a640c0ccc1111241fd8e5

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