Malicious PDF — malware analysis report

Static analysis result for SHA-256 33e7cd16087e38f8…

MALICIOUS

PDF

55.8 KB Created: 2020-03-22 13:10:09 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6) First seen: 2020-09-24
MD5: 4d962bcfae8f8f752851ec16ec9d5f1a SHA-1: 2a1ff9b423866667e4d2e59f2083fd3f79cf3d71 SHA-256: 33e7cd16087e38f80b7dc17ab956931e8df297525f6db6727d5d8426822e398f
96 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many with numeric slugs, indicative of a link farm or SEO manipulation tactic. The embedded document body text, while garbled, contains a URL that is also present in the heuristics and the list of URLs. This suggests the PDF's primary purpose is to redirect users to external websites, potentially for malicious purposes such as hosting further exploits or phishing content. No scripts were extracted, limiting the analysis of direct execution capabilities.

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://dylanwyke.com/uploads/1/3/0/5/130588560/130588560.html#rig+veda+in+hindi+online+read PDF link annotation
    • http://risesportscast.com/uploads/1/3/0/7/130776801/goxidemifejuraliwura.pdfIn PDF document text
    • http://www.50plussguiden.no/uploads/1/3/0/9/130969260/1062324.pdfIn PDF document text
    • http://rensselaervilleramble.org/uploads/1/3/0/7/130776180/7939679.pdfIn PDF document text
    • http://littlehousefoodsocal.com/uploads/1/3/0/5/130588551/jubabiviterove-vonabi-sorinurawasago-feveguvajap.pdfIn PDF document text
    • http://brandonkew.com/uploads/1/3/0/6/130639929/66804.pdfIn PDF document text
    • http://kerrymckenna.com/uploads/1/3/0/4/130475959/c95b6a85.pdfIn PDF document text
    • http://caterers.solutions/uploads/1/3/0/4/130490399/7933525.pdfIn PDF document text
    • http://planningprotocol2.com/uploads/1/3/0/4/130435701/lololasikevepin.pdfIn PDF document text
    • http://rootsbeforereach.com/uploads/1/3/0/6/130604518/sitonexuw.pdfIn PDF document text
    • http://www.soultrainchoir.co.uk/uploads/1/3/0/5/130540664/873a0e9128f2.pdfIn PDF document text
    • http://thesockingdead.com/uploads/1/3/0/6/130603741/fc60d818e.pdfIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • https://savannah.gnu.org/projects/freefont/In PDF document text
    • http://www.gnu.org/licenses/In PDF document text
    • http://www.gnu.org/copyleft/gpl.htmlIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007d92.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7D92 7948 bytes
SHA-256: 7ac74365f35e54c3326b3c672ad828c2c36ab3f9b91fa3f16f5d390b5bc2c567
font_01_sfnt_off00009c57.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9C57 1388 bytes
SHA-256: 1723f1ced37cc89d69e30f3df6281c5e5fb8989544fd4587aa75b00c91af2fd0
font_02_sfnt_off0000a3bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA3BD 15424 bytes
SHA-256: 45ba83ea3a71cb824ecba25d9a2c12c4ccc15a9cbc54238a18d3287b52302629

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