Malicious PDF — malware analysis report

Static analysis result for SHA-256 7e930cd2e0849cdb…

MALICIOUS

PDF

108.2 KB Created: 2020-11-22 07:09:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: 21096f5b614e9dc10bfee99692a50210 SHA-1: d6623460184591302030aa7050e5a10e5b6e1ad2 SHA-256: 7e930cd2e0849cdb367a8d89386b0b4f5e97055e2eadd9b3b73a6c65da4ece0f
214 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document was flagged as malicious by ClamAV and 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 0.9995

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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?utm_term=egyptian+eye+makeup+facts In PDF document text
    • https://kejijasorakabil.weebly.com/uploads/1/3/4/3/134311956/jususaperelix-dedakapanigi.pdfIn PDF document text
    • https://nadebexipopajin.weebly.com/uploads/1/3/4/6/134678264/kepisejosobir-kimexiv-bunipevosoze-rovupidiser.pdfIn PDF document text
    • https://rediwikutine.weebly.com/uploads/1/3/4/0/134096605/7b191b684c29.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4411231/normal_5fb263275ea78.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/9a5951af-9038-4552-8153-80a42fda8537/projeto_para_fazer_um_carrinho_de_rolim.pdfIn PDF document text
    • https://s3.amazonaws.com/lanorolowu/komelarukurexatezud.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9871ed65-a916-44ac-ba40-848feeb10e19/exercicios_resolvidos_diagrama_de_br.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/98319513-bdc5-41d3-a15c-a5bdd37c028c/gizosuzasotezeganozapuzal.pdfIn PDF document text
    • https://s3.amazonaws.com/juzerilem/toshiba_satellite_l55_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0ae762ff-2a6e-4886-bc6f-300b932240cc/teacup_shih_tzu_puppies_for_sale_in_michigan.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/17e380ac-f085-45a5-82fa-8c28783bea8c/wozugowi.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_off00015c59.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15C59 5100 bytes
SHA-256: acc66c3a21caea3b48fb61b5ecf688224978e24d1f54ff8538917800c93bfba7
font_01_sfnt_off00016dbd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16DBD 11984 bytes
SHA-256: 0a0e4dbd6e8e5db931bc1ba1c47014d8efbae487fc59094d040f8f37304d81c1
font_02_sfnt_off00019573.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19573 4324 bytes
SHA-256: ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230

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