Malicious PDF — malware analysis report

Static analysis result for SHA-256 ed902cb74781d470…

MALICIOUS

PDF

33.8 KB Created: 2020-10-26 05:38:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: bcea70eca222116359d4570c19daf978 SHA-1: ebf6eec36f7f270308d73ef7ee14251e7c3b4c34 SHA-256: ed902cb74781d470b7b74acd488da04864d1b56a0759377fbdfa86af3f5eb79a
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a link to a known malicious redirector, indicating a phishing or malware distribution attempt. The document body, though heavily obfuscated, contains text related to business plans and includes the malicious URL, suggesting a lure. The presence of numerous embedded links to external PDFs, many hosted on S3, further supports the idea of a link farm or redirection scheme.

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=south+african+business+plan+examples+pdf In PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/degagaziv/zivuderaxufamelivakoli.pdfIn PDF document text
    • https://s3.amazonaws.com/vedexajawo/solo_guitar_songs.pdfIn PDF document text
    • https://s3.amazonaws.com/xisefowu/another_brick_in_the_wall_part_2_sheet_music.pdfIn PDF document text
    • https://s3.amazonaws.com/zuses/86184096699.pdfIn PDF document text
    • https://s3.amazonaws.com/zetare/complete_guide_to_the_revolutionary_platform_business_model.pdfIn PDF document text
    • https://s3.amazonaws.com/lefemijip/punctuation_worksheets_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/01dc2f51-8c1c-4a6e-9ea1-dc29a7cc130e/lekigazizopafuvemavavag.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e7ac0f66-9727-44d5-9826-f72f9a3d03c2/28253825807.pdfIn PDF document text
    • https://s3.amazonaws.com/vonuxagupeduze/biology_question_in_hindi.pdfIn PDF document text
    • https://s3.amazonaws.com/dotivaf/jidurijemosut.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0498/9331/0631/files/lekefuxetupedin.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0502/2351/3778/files/70539823646.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9ad7ba2e-d60c-4828-80c4-ac0b414252f4/fudakav.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4df71b04-48a0-41ae-bd83-b751b30b3df9/59265222524.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_off000045b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x45B8 5708 bytes
SHA-256: 2b85a9d847fa02c4f6281935f3df8b9a6b75ef0ea8c9a3a1d71ea6471c9f8975
font_01_sfnt_off000058eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x58EB 9936 bytes
SHA-256: 3dbd5cc5f4aa67b87f628600a31808fbe4d8399e4e186bb3daeeb1c9f9df7b17

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