Malicious PDF — malware analysis report

Static analysis result for SHA-256 098afc3b8ea7e21c…

MALICIOUS

PDF

48.6 KB Created: 2020-03-29 06:31:19 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 412ac9aba10d0a815abc204fe525c156 SHA-1: 0a518539c37c0937b4d46b68bc2b7a6275bd1ae3 SHA-256: 098afc3b8ea7e21c93862c3daf11f4e8300c16b3158ac8ab6f2b448af21f62ed
96 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs that point to other PDF files hosted on various domains, suggesting a link farm or SEO spam campaign. The ML classifier strongly indicated maliciousness. The presence of embedded URLs and the nature of the heuristic firings suggest this document is part of a distribution chain, likely intended to redirect users to malicious content or further stages of an attack.

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://74-123-77-82.mgwnet.com/uploads/1/3/0/5/130540065/130540065.html#physics+for+scientists+and+engineers+4th+edition+pdf+randall+knight
    • http://scw6.whedonstudies.tv/uploads/1/3/0/7/130738975/f10629c.pdf
    • http://bethelmoms33.com/uploads/1/3/0/6/130639217/ebc979ae6f0c.pdf
    • http://rtcranch.com/uploads/1/3/0/7/130776734/0e97ef.pdf
    • http://shyzarsue.com/uploads/1/3/0/5/130550948/nokovolulegeg-nifasuzujeve-gixotazeliwasot.pdf
    • http://datsaussales.com/uploads/1/3/0/7/130739247/ee058aa09.pdf
    • http://postmaster.locajeux.be/uploads/1/3/0/6/130620679/vuxuv_morodowu_wigigovad.pdf
    • http://www.the-fword.net/uploads/1/3/0/3/130379928/tosisasuf_zivavo.pdf
    • http://hostmaster.spaceforfaith.co.uk/uploads/1/3/0/4/130435909/6060013.pdf
    • http://underleaves.com/uploads/1/3/0/7/130739723/1504451.pdf
    • http://theatelierllc.com/uploads/1/3/1/1/131164002/dugajamojexesuw.pdf
    • http://drewmichaelpga.com/uploads/1/3/0/7/130775742/47244f8e2203f.pdf
    • http://funpicturebooks.com/uploads/1/3/0/7/130775092/430de7bd855.pdf
    • http://a2z-pestcontrol.com/uploads/1/3/0/6/130620942/patadebuvetokila.pdf
    • http://www.macherieboutique.com/uploads/1/3/0/2/130270967/wedadunogifipakuxoma.pdf
    • http://awakelocdandready.com/uploads/1/3/0/8/130814286/8279391.pdf
    • http://myotherapyservices.org/uploads/1/3/0/9/130969701/94cfb2.pdf
    • http://nses.northsmithfieldschools.com/uploads/1/3/0/6/130621031/9980132.pdf
    • http://nateveorganic.com/uploads/1/3/0/5/130588747/domoloxereso.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_off000093ea.bin
0e1b24e0a5c5f6b079d07ce4cb65836f9d3dfec40bdec3ed1755912a6e656da0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x93EA 8420 bytes

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