Malicious PDF — malware analysis report

Static analysis result for SHA-256 a24eecc8a1c6c030…

MALICIOUS

PDF

38.2 KB Created: 2020-05-01 01:29:25 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: de246a18ee49135394a58b523e10b19d SHA-1: 4c82352a61ae6fa6cbca9e947c542dcc99fcc881 SHA-256: a24eecc8a1c6c0306fe4e0d4e6d7451714a12c3b72acbba2c526349963823778
94 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many of which point to PDF files with numeric or generic slugs, indicative of a link farm for SEO manipulation. The ML classifier strongly flagged this PDF as malicious. The embedded URLs and the structure of the links suggest an attempt to drive traffic to potentially malicious or phishing content, rather than delivering a direct payload within the PDF itself.

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://bernardobellostudio.com/uploads/1/3/0/5/130550973/130550973.html#the+binding+of+isaac+rebirth+apk+english
    • http://sistemasappcc.com/uploads/1/3/0/7/130739532/7424916.pdf
    • http://averyhomeinspectionllc.com/uploads/1/3/0/6/130604091/zugisom.pdf
    • http://vistawaycafe.com/uploads/1/3/1/3/131398077/pelerisowovi.pdf
    • http://abigailsandersstudio.com/uploads/1/3/0/7/130775129/6243527.pdf
    • http://enspirebrandcbd.com/uploads/1/3/0/9/130969419/jemefedevomavipewa.pdf
    • http://earnincomeonline.ca/uploads/1/3/1/4/131483031/kapogibi.pdf
    • http://bigceemusic.com/uploads/1/3/0/6/130621196/1267beeaf.pdf
    • http://metissemotorcycles.com/uploads/1/3/1/4/131408970/junul.pdf
    • http://telemarque.no/uploads/1/3/1/3/131383553/4763845.pdf
    • http://strengthsy.com/uploads/1/3/0/7/130740146/netokodewal_pufojadev.pdf
    • http://mikaylabrowne.com/uploads/1/3/0/7/130776213/bakujajonefazozerime.pdf
    • http://shun.city/uploads/1/3/1/1/131164272/kozusi_ruzekekivokuz.pdf
    • http://mikaylabrowne.com/uploads/1/3/0/7/13077621
    • 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_off00006cb3.bin
2612232a5a50b8842b6c2940d61b29bc675bdd8d27af5ced3b8e068493fee008		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6CB3 8220 bytes

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