Malicious PDF — malware analysis report

Static analysis result for SHA-256 195986c172103503…

MALICIOUS

PDF

35.4 KB Created: 2020-03-29 11:52:52 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: b7ac2e48659f5de3cf514e28f65323f4 SHA-1: 04115ae622b07ed02dd35753f3f9582dc8e39092 SHA-256: 195986c17210350356250db1179f7608d4fa5276574bdcc4fb0ff16223764e49
96 Risk Score

Malware Insights

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

The PDF document uses a lure of 'free download' to entice users, while embedding a large number of external links to other PDF files. This behavior is indicative of a link farm or a distribution mechanism for further malicious content. The ML classifier strongly supports the malicious nature of this PDF.

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://nlightnstudio.com/uploads/1/3/0/6/130605212/130605212.html#main+tera+hero+full+song+mp3+free+download
    • http://eliasmmm.com/uploads/1/3/0/7/130740563/04c40f34.pdf
    • http://rollinghillproperties.com/uploads/1/3/1/4/131406606/a1ed0fe7.pdf
    • http://site-ops.net/uploads/1/3/0/5/130546497/7612499.pdf
    • http://kommandosouth.com/uploads/1/3/0/2/130291822/3fb5619f201e92a.pdf
    • http://weavingofwomen.com/uploads/1/3/0/6/130604527/wobiti-fomaludebedel-somox-tisomivab.pdf
    • http://mjhealinghandswellness.com/uploads/1/3/0/7/130739893/zomupazaseje_rafavavakaf_pimuvafuwap.pdf
    • http://chytryreport.cz/uploads/1/3/0/5/130543640/b3deb7.pdf
    • http://precisionimprint.net/uploads/1/3/0/4/130489418/zexoga.pdf
    • http://gatewaydevelopmentgroup.org/uploads/1/3/0/6/130620998/3a4774076274.pdf
    • http://vocalrangesfestival.com/uploads/1/3/0/7/130775835/dagoxibitip.pdf
    • http://creativedesignconcrete.org/uploads/1/3/0/7/130739524/93eaad5a8e359e5.pdf
    • http://mfc.solutions/uploads/1/3/0/6/130639312/bubujupiwutez.pdf
    • http://pathpointstohealth.com/uploads/1/3/0/9/130969731/bunipuvoweda.pdf
    • http://womynrising.com/uploads/1/3/0/3/130323811/ripaf.pdf
    • http://industrialcommercialdomestic.com/uploads/1/3/0/5/130589158/8950978.pdf
    • http://rallynational.info/uploads/1/3/0/9/130969593/kevezelogovuwem.pdf
    • http://melbourneprivateinvestigations.com/uploads/1/3/0/7/130776526/4937ac.pdf
    • http://fatherpandero.com/uploads/1/3/0/2/130289242/50f0d.pdf
    • http://iwontbesilenced.com/uploads/1/3/0/5/130540869/kofuzalo-vadabalete-jegusawuzesita.pdf
    • http://bceastrong.net/uploads/1/3/0/3/130323818/50f5f11a5c0.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_off0000636f.bin
c2b6fee5a27f681f2b534acbdb1f0221edc40f71a20b54563cca773fe2ac4eb0
pdf-font-stream PDF embedded font (sfnt) at offset 0x636F 7248 bytes