Malicious PDF — malware analysis report

Static analysis result for SHA-256 aabc4d5364cd7781…

MALICIOUS

PDF

33.1 KB Created: 2020-04-02 22:21:06 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 3905166bd2ce32ea62466c971a14a65b SHA-1: 1ee369b0438cb63b3fac24f5dae3a111788d7269 SHA-256: aabc4d5364cd77814172a15d5d8e8118c3ed87da8e3308686c05c7cbd3c5fb39
94 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a large number of external links, a technique often used for SEO link farming or to redirect users to malicious sites. The document body, though partially obfuscated, contains references to 'Controle equation 4eme pdf' and URLs, suggesting a lure to external content. The ML classifier strongly indicated maliciousness, supporting the assessment of a malicious link farm or redirection scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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 http://shannonfoleyart.com/uploads/1/3/1/4/131452929/131452929.html#controle+equation+4eme+pdf
    • http://integritycostconsultants.com/uploads/1/3/0/6/130620176/05a88c936.pdf
    • http://ahbaker.com/uploads/1/3/0/5/130541733/5d890cc7b.pdf
    • http://abpip.info/uploads/1/3/0/7/130775983/zidumevofom_vidoviv_wudojer_valusi.pdf
    • http://credclimb.com/uploads/1/3/0/9/130969664/7385879.pdf
    • http://gslayerconsultants.com/uploads/1/3/0/6/130620605/3739315.pdf
    • http://romanceandrust.com/uploads/1/3/0/4/130435982/kujubobud-rojisegu.pdf
    • http://www.bistrosintbaafs.be/uploads/1/3/0/7/130738684/7636483.pdf
    • http://coastalcosmetictattoos.com/uploads/1/3/0/9/130969027/fepifuk_jejubavenojisix.pdf
    • http://museodelamujer.org/uploads/1/3/0/7/130776162/fd2e7f.pdf
    • http://livingthegoodlimelife.com/uploads/1/3/0/6/130604848/zozug.pdf
    • http://wecf2.com/uploads/1/3/0/5/130551890/4217982.pdf
    • http://thereikiroadshowacademy.com/uploads/1/3/0/7/130739603/9278931.pdf
    • http://rx-next.com/uploads/1/3/0/7/130739039/8566e856527.pdf
    • http://pengsoofood.com/uploads/1/3/0/7/130776291/vamomazigas.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/

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005945.bin
27dab201bfd78b5214b91c1b1a1232e6db6f2c37ff6e6f1d70bcd222b8cbe77d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5945 7908 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.