Malicious PDF — malware analysis report

Static analysis result for SHA-256 7fb90ce8398567c7…

MALICIOUS

PDF

43.5 KB Created: 2020-03-29 14:16:22 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: d9beb1aa934c3acee457bd32324590e9 SHA-1: 89ae64a4fc977e332c4ac9fddc6b7f489165e84f SHA-256: 7fb90ce8398567c7f2322c99664bb0d0f00387a73f2b229820ebd4b4c25eecf4
94 Risk Score

Malware Insights

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

The PDF file contains a large number of external links to various domains, a technique often used for SEO poisoning or to distribute malicious content. The embedded document body text, while partially obfuscated, includes a URL that points to a collection of HTML and PDF files. This suggests the primary function is to redirect users to a network of potentially malicious sites.

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://74-123-77-252.mgwnet.com/uploads/1/3/0/7/130775422/130775422.html#multiplicaciones+y+divisiones+de+expresiones+algebraicas
    • http://traumallamas.com/uploads/1/3/0/6/130639477/2491115.pdf
    • http://morethanapipeline.org/uploads/1/3/0/6/130604795/00359f.pdf
    • http://robnieboer.com/uploads/1/3/0/5/130590438/6303395.pdf
    • http://rocketamusements.org/uploads/1/3/0/5/130551935/1766566.pdf
    • http://wankyunrhakim.com/uploads/1/3/0/4/130477633/4107183.pdf
    • http://fiveforksawanatest.com/uploads/1/3/1/0/131071295/bumanadepekogufawo.pdf
    • http://bellavisagesalonandspa.com/uploads/1/3/0/5/130588393/68998970f9874.pdf
    • http://radiantdiamondscomic.com/uploads/1/3/0/6/130605034/newerusabevi_wifaf_bebepazax.pdf
    • http://hilfda.ch/uploads/1/3/0/7/130738911/dikezinik.pdf
    • http://dopemedicalapparelandaccessories.com/uploads/1/3/0/2/130271212/5252923.pdf
    • http://lillienmellis.com/uploads/1/3/0/5/130588501/1590186.pdf
    • http://reallifewithrealdogs.com/uploads/1/3/0/6/130620936/537541.pdf
    • http://hassleholmsfotoklubb.se/uploads/1/3/0/6/130620968/a4fa1e9ca2850d.pdf
    • http://divadollscouture.com/uploads/1/3/0/9/130969446/pugivute_rawamanagez.pdf
    • http://costaparadiso.holiday/uploads/1/3/0/5/130551922/9750320.pdf
    • http://evylareau.com/uploads/1/3/0/5/130590357/b061a.pdf
    • http://lanosaints.com/uploads/1/3/0/5/130590051/e3d355fe8e0e.pdf
    • http://airconreviewed.com/uploads/1/3/0/7/130776787/rozakoko-fegenukiwijema-janorazibuzetim-kumuvila.pdf
    • http://allnetvideoandphotography.com/uploads/1/3/0/7/130739892/xebizomuvamegobafavo.pdf
    • http://bgflowermart.com/uploads/1/3/1/3/131382673/givorumesubizon_tazug_fozuf.pdf
    • http://vitalselfcare.com/uploads/1/3/0/4/130475881/99c41409b424d8d.pdf
    • http://busybeaverlogging.com/uploads/1/3/0/4/130476743/sidulodenas.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_off00007e13.bin
c82f2710cca92b280ade0581c7a784939a932224ef244c4a8619c6cdcfcb4a08		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7E13 8808 bytes

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