Malicious PDF — malware analysis report

Static analysis result for SHA-256 7219b30501f02014…

MALICIOUS

PDF

44.6 KB Created: 2020-08-02 19:20:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 07d242b845592af64db10b1be3c90714 SHA-1: cb2d257eda013f7d8ed9800e64bf40988253cda8 SHA-256: 7219b30501f02014bbe32890a85855ed4a904b3974aa8f74c73d53d0bae2cada
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded links that point to a known malicious redirector, suggesting an attempt to lure users to malicious content. The document body, though heavily obfuscated, contains references to 'xml to pdf java' and URLs, reinforcing the lure. The ML classifier strongly flagged this PDF as malicious, indicating a high probability of malicious intent.

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.com/pify?keyword=xml+to+pdf+java
    • http://files.fourseasonsrentalequipment.com/uploads/1/3/0/7/130776639/5446793.pdf
    • http://files.stardanceprovo.com/uploads/1/3/0/7/130738666/rejila.pdf
    • http://files.wlcbands.com/uploads/1/3/1/6/131607712/2769e0d94.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/0374/8260/files/xorufojofodapi.pdf
    • https://cdn.shopify.com/s/files/1/0430/3188/8021/files/91603107348.pdf
    • https://cdn.shopify.com/s/files/1/0437/8004/6997/files/88274957066.pdf
    • https://cdn.shopify.com/s/files/1/0435/3517/1736/files/62122537906.pdf
    • https://cdn.shopify.com/s/files/1/0429/8155/6375/files/sims_3_cc_tumblr.pdf
    • https://cdn.shopify.com/s/files/1/0439/8094/7614/files/21296702026.pdf
    • https://cdn.shopify.com/s/files/1/0430/3942/4669/files/bipajilejivekili.pdf
    • https://cdn.shopify.com/s/files/1/0432/2073/0011/files/xosepamipijo.pdf
    • https://cdn.shopify.com/s/files/1/0431/8937/1029/files/jusupagejitunutan.pdf
    • https://cdn.shopify.com/s/files/1/0429/7588/7523/files/zeduvaza.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/dadimutixiwukigojubiw.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006226.bin
4368b46ccc9008ffb32e7fc14a35edb2e36e72a81ede848ded414857831d4125
pdf-font-stream PDF embedded font (sfnt) at offset 0x6226 5028 bytes
font_01_sfnt_off00007342.bin
e7cee09d6acebcb30a2272400f11cb1519a49d80b92574813cb0373ebac57bff
pdf-font-stream PDF embedded font (sfnt) at offset 0x7342 18404 bytes