Malicious PDF — malware analysis report

Static analysis result for SHA-256 3405e6afc6eaae82…

MALICIOUS

PDF

40.9 KB Created: 2020-11-01 16:50:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: bdce19e84df2b8171969591880fb5791 SHA-1: df18fb5188f15bf269f6954e8342804dbf4bbf79 SHA-256: 3405e6afc6eaae8289237bd145bf1853573b6428297248a1152ded2dc00eee38
154 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, identified by the 'PDF_MALICIOUS_REDIRECTOR_LINK' heuristic. The document body, though heavily obfuscated, contains the URL and text suggesting an online training lure. The presence of numerous external links, as flagged by 'PDF_SEO_LINK_FARM', further indicates a malicious intent to distribute harmful content or traffic. No scripts were extracted, but the embedded URL is the primary indicator of compromise.

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://gettraff.ru/wb?keyword=hub%20online%20training In PDF document text
    • https://rakamukomegu.weebly.com/uploads/1/3/2/6/132681656/9889394.pdfIn PDF document text
    • https://netaluzubik.weebly.com/uploads/1/3/0/8/130813777/f6df655a19a0b84.pdfIn PDF document text
    • https://sonujesenusa.weebly.com/uploads/1/3/4/3/134344018/7120587.pdfIn PDF document text
    • https://tafopolen.weebly.com/uploads/1/3/4/3/134396822/bobiz.pdfIn PDF document text
    • https://memarexegota.weebly.com/uploads/1/3/4/3/134366516/5943939.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/8dce135a-7e1e-423c-a3f7-e2c40e445958/36074849494.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f0981b5e-1a60-4354-89bf-10a7bfdfbcee/general_mobile_discovery_usb_driver.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/12a2a3fa-7973-4a1c-a2f4-aabb859b1ac4/8958643420.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f67a0a5a-5c6e-4f5c-a98e-24412ca3a92f/book_of_jasher_free_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/34fc35b6-e3d1-483d-81b7-03e0bf95dfe9/52889606417.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e9b675f6-1e45-47e3-919d-2acb0b2468c1/40730023313.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e7351887-364e-45b2-ae89-2c2bc8df0934/sezur.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e20e72ac-2116-4a9b-a838-8ef350387315/88375181180.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_off000060c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x60C7 4776 bytes
SHA-256: 22a9f9b12a1e62831d3da815ca7edbe1da3eb43f6cd39c43d67de8c530251c9f
font_01_sfnt_off00007110.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7110 11264 bytes
SHA-256: 9672de9ec661c73bd0b073a21c539f46d603b20b4066485e45e0c6d1850112d8

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