Malicious PDF — malware analysis report

Static analysis result for SHA-256 7441e343f61625e4…

MALICIOUS

PDF

42.2 KB Created: 2020-04-08 13:11:10 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: d80cd87b22c4762e2ac87f741def6189 SHA-1: 0904cd7af3dc7e35a98d03404c5d700612515730 SHA-256: 7441e343f61625e4682f34a679892f5b393e694ea7b48565e6bff30fa1fca53e
96 Risk Score

Malware Insights

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

This PDF document contains a large number of external links, a technique often used for SEO spam or to redirect users to malicious sites. The ML classifier strongly indicated maliciousness. While no scripts were explicitly extracted, the PDF structure and numerous embedded URLs suggest an attempt to drive traffic to potentially harmful content, possibly leveraging JavaScript for obfuscation or redirection.

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://lavaquitafeliz.net/uploads/1/3/0/4/130476069/130476069.html#icd+10+code+for+hx+uterine+cancer
    • http://u2construction.com/uploads/1/3/0/7/130739686/70b7fe02.pdf
    • http://armkandiethelabel.com/uploads/1/3/0/5/130588616/3313782.pdf
    • http://icconic.com/uploads/1/3/0/6/130639365/zonifi.pdf
    • http://pendulumhealing.com/uploads/1/3/0/5/130590413/99c97a628f7cfd.pdf
    • http://milkers-gloves.com/uploads/1/3/0/6/130639624/nabiri.pdf
    • http://visitthepreserve.org/uploads/1/3/0/3/130313158/979a01.pdf
    • http://w-southern.com/uploads/1/3/0/3/130323381/9277172.pdf
    • http://losoyameles.com/uploads/1/3/1/3/131398425/9177265.pdf
    • http://singletonministriders.com/uploads/1/3/0/5/130590224/2c2160152ed.pdf
    • http://plungeagency.com/uploads/1/3/0/8/130874365/8187449.pdf
    • http://jesuschristholytemple.org/uploads/1/3/0/9/130969699/873593.pdf
    • http://acifte.org/uploads/1/3/0/4/130491444/5d5f44accb03d7f.pdf
    • http://syvmusicboosters.com/uploads/1/3/1/3/131379306/a7c6348d.pdf
    • http://brainorgasm.org/uploads/1/3/0/4/130488621/fb72d9c448b8.pdf
    • http://eternal-aesthetics.com/uploads/1/3/0/2/130289311/e1a4bf95d9b983c.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_off00007d74.bin
99feb38a2850ee1501f2b0630ea2f0b93879ce0a978cbab73c6b38f52ee66e86		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7D74 7864 bytes

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