Malicious PDF — malware analysis report

Static analysis result for SHA-256 faca27ded8bce423…

MALICIOUS

PDF

55.9 KB Created: 2020-10-26 16:48:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 702e0f3b6a36ed160eb0bb65f9ad2efd SHA-1: 2cbd43e7f4aea653fb72710ea493a55585c697aa SHA-256: faca27ded8bce4232a633ea8e00679d1774d5853176bdd6c3ba8039cdf833b5a
174 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a large number of embedded links, many pointing to link farms hosted on Weebly, and one critical link to a known malicious redirector. The document body, though heavily obfuscated, contains URLs that are likely part of a phishing or malware distribution scheme. The presence of a lure to enable editing suggests an attempt to bypass security measures and execute malicious content.

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.
  • Macro/content-enable lure medium SE_ENABLE_LURE
    Document instructs the user to enable macros or editing — a common technique used by malware droppers to bypass Office macro security settings
  • 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://ttraff.cc/123?keyword=keppra+100+mg%252Fml+bula+pdf In PDF document text
    • https://finivoxub.weebly.com/uploads/1/3/4/3/134387593/9785280.pdfIn PDF document text
    • https://gakuwalexutibok.weebly.com/uploads/1/3/4/3/134332976/zaferetadowezad-nejig-dokipe.pdfIn PDF document text
    • https://buxivadoga.weebly.com/uploads/1/3/0/7/130740323/3479789.pdfIn PDF document text
    • https://xusawoji.weebly.com/uploads/1/3/0/7/130739635/rawele.pdfIn PDF document text
    • https://xedaliwim.weebly.com/uploads/1/3/1/4/131454603/2553404.pdfIn PDF document text
    • https://nipufijupetobug.weebly.com/uploads/1/3/1/4/131482996/jazatozesaja.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/16ab7c23-0640-4a70-816d-803ec77e12a7/80501548251.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1ccf90c2-ea77-4e04-af3a-e89e8e8d579d/gilurovapixubujenu.pdfIn PDF document text
    • https://s3.amazonaws.com/nemafu/zodegiv.pdfIn PDF document text
    • https://s3.amazonaws.com/petikamov/burapenifoj.pdfIn PDF document text
    • https://s3.amazonaws.com/jumedemimo/sondaje_vesical_procedimiento.pdfIn PDF document text
    • https://s3.amazonaws.com/jamokaroxoj/wumuvowagefowufotegusodos.pdfIn PDF document text
    • https://s3.amazonaws.com/pazifetanegapu/17512589827.pdfIn PDF document text
    • https://s3.amazonaws.com/tetazino/96438048541.pdfIn PDF document text
    • https://s3.amazonaws.com/zarelusipofox/vocabulary_for_ielts_advanced_with_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/zuxadol/bulgakov_heart_of_a_dog.pdfIn PDF document text
    • https://s3.amazonaws.com/bivanud/english_to_marathi_dictionary_file_free_download.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_off00008fcd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8FCD 5060 bytes
SHA-256: efea3912eaa0a2fbd482de9806be5bbc6cad56f08ae45fb4752e71344e012b7f
font_01_sfnt_off0000a106.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA106 10336 bytes
SHA-256: 9c478b102508573f79344feacc26f0af1a7952e26c3b1023ea36ba4603f6e797
font_02_sfnt_off0000c458.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC458 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

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