Malicious PDF — malware analysis report

Static analysis result for SHA-256 710f82263bcbe267…

MALICIOUS

PDF

75.9 KB Created: 2020-09-21 03:27:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 0a9a001562b26ae006ce8e6d104cd6e8 SHA-1: bb5c15d4d7ad530aa3be2fef9df9fa1f2796b897 SHA-256: 710f82263bcbe267e5179e08339ca5a3a4e28cd110b5c1ed4ee5eaf35b8fef17
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with at least one identified as a known malicious redirector. The document body, though heavily obfuscated, contains a URL that matches the malicious redirector, suggesting an attempt to trick users into downloading potentially harmful software. The ML classifier also strongly indicated maliciousness.

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://ttraff.me/wix?keyword=clear+vision+2+17%252B+apk In PDF document text
    • http://nejozogi.liverkids.com/uploads/1/3/1/4/131406149/kinali.pdfIn PDF document text
    • http://files.hopespringsvillage.org/uploads/1/3/1/3/131381259/sawinijalitidusev.pdfIn PDF document text
    • http://files.risingravenband.com/uploads/1/3/1/3/131384018/buvab.pdfIn PDF document text
    • http://files.kiropraktikaistra.com/uploads/1/3/2/6/132682685/59daf.pdfIn PDF document text
    • http://gopako.99thmonkey.co.uk/uploads/1/3/0/7/130776054/rodabapuwiwa.pdfIn PDF document text
    • https:///www.minecraft.net/helpIn PDF document text
    • https:///www.minecraft.net/In PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/5009/9100/files/99767772022.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7096/3350/files/45270720039.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7916/4314/files/29975521034.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/9069/6597/files/17732944421.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2358/0830/files/45321290969.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2442/4853/files/vujogotofabadadivigi.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cfd9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCFD9 5104 bytes
SHA-256: 94fa71f70801537612f8c9051020d9e84223e68c31013ceace31619a547033d8
font_01_sfnt_off0000e160.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE160 13548 bytes
SHA-256: cb350292d6d6fa24d7cba72e76be0dce005a46a2561a84c8c48b1e4188c531c5
font_02_sfnt_off00010cb4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10CB4 16256 bytes
SHA-256: 448adf67d9c972b4fdf28ee6e2294ced0d62b2c4b97688d7e6d113c7578796ac

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