Malicious PDF — malware analysis report

Static analysis result for SHA-256 19b32f71510f382c…

MALICIOUS

PDF

62.2 KB Created: 2020-08-08 21:14:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0252bb38b10040919ea046bfa7671916 SHA-1: 2567f08c617ea46e76d527fa07a101874f2e03c9 SHA-256: 19b32f71510f382cfabaf4154d9018d0fb3c78f4adaa324637513375106f933a
154 Risk Score

Malware Insights

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

The PDF contains a link that redirects to a known malicious domain, disguised as a document about stomach cancer. The ML classifier strongly indicates maliciousness. The embedded URL is likely intended to lead the user to a malicious site, possibly for phishing or malware distribution.

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.cc/pify?keyword=etiologia+del+cancer+de+estomago+pdf
    • http://files.moirajo.com/uploads/1/3/2/7/132710655/6052939.pdf
    • http://files.antoniocoach.com/uploads/1/3/2/6/132681316/85b91a4acc4b7c3.pdf
    • http://tilabar.alaskazooarch.org/uploads/1/3/2/7/132740214/21b52928b2ea9c.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/3630/2750/files/atonement_ian_mcewan.pdf
    • https://cdn.shopify.com/s/files/1/0433/4167/6694/files/66798071198.pdf
    • https://cdn.shopify.com/s/files/1/0431/8072/0294/files/pazilete.pdf
    • https://cdn.shopify.com/s/files/1/0428/9291/8937/files/gatatajamodapaxodux.pdf
    • https://cdn.shopify.com/s/files/1/0433/3764/6245/files/xikalesexitexuwojuz.pdf
    • https://cdn.shopify.com/s/files/1/0434/2684/0737/files/gilejomipidepafumop.pdf
    • https://cdn.shopify.com/s/files/1/0437/3096/0536/files/miworagurikuvazukirix.pdf
    • https://cdn.shopify.com/s/files/1/0431/0656/6306/files/76045069179.pdf
    • https://cdn.shopify.com/s/files/1/0428/5913/5132/files/94706880043.pdf
    • https://cdn.shopify.com/s/files/1/0436/4215/9257/files/21325053063.pdf
    • https://cdn.shopify.com/s/files/1/0432/7201/1932/files/5626024690.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_off0000b5a1.bin
6cb27d181435a5fd39bba42a6a14e73c206a789718ea1983cc33a275ae0bf267
pdf-font-stream PDF embedded font (sfnt) at offset 0xB5A1 5432 bytes
font_01_sfnt_off0000c809.bin
9d2079b2b1395de13980c003619fab2ee540713ef9d1cb3739ee63a4ab74a03c
pdf-font-stream PDF embedded font (sfnt) at offset 0xC809 10404 bytes