Malicious PDF — malware analysis report

Static analysis result for SHA-256 a3bd1e7cbf465a85…

MALICIOUS

PDF

39.3 KB Created: 2020-03-11 09:37:55 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 155fb0e17829d58ca2cb263804dab1d2 SHA-1: dda20344491de9c1a6f70edcdd82afff12f5f0f6 SHA-256: a3bd1e7cbf465a8502775ce9ace7ebd9ce871adde737e16ae9003db8d94b3f69
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains a large number of external links, a technique often used for SEO spam or to redirect users to malicious sites. The ML classifier strongly indicated maliciousness. The embedded document body text, though partially obfuscated, contains references to URLs that are also present in the extracted URL list, reinforcing the link-farming attack pattern.

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://s0b2b.slpny.com/uploads/1/3/0/8/130874136/130874136.html#osprey+vtol+uk
    • http://jesengineeringservices.com/uploads/1/3/0/7/130775259/lexuzokixojopifot.pdf
    • http://airconditioningguam.com/uploads/1/3/0/6/130620150/vakuxo-pafitig-fumawigewidewuk-sosaw.pdf
    • http://thymetolavender.com/uploads/1/3/0/7/130776808/a253149089fe4b5.pdf
    • http://bhandare.in/uploads/1/3/0/8/130874497/sifikalunepojos.pdf
    • http://www.becrownedhoney.shop/uploads/1/3/0/8/130814360/5021775.pdf
    • http://awbphotography.ca/uploads/1/3/0/6/130604067/7836147.pdf
    • http://allegorieco.com/uploads/1/3/0/7/130739582/nubasugus.pdf
    • http://cyberbullyupstander.com/uploads/1/3/0/2/130272928/d3a5b.pdf
    • http://khdggaw.com/uploads/1/3/0/2/130287942/ea907bd9.pdf
    • http://justkenosha.net/uploads/1/3/0/7/130739232/waxos_jukilipejano_dosaxules_xoxogu.pdf
    • http://the-wild-moon.com/uploads/1/3/0/5/130589097/a0db1dcb9111.pdf
    • http://arredamentocucinevarese.it/uploads/1/3/0/5/130551935/kotem.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_off00006eac.bin
27a5a6fc91902a2e46cec6d97835f5c25d313bdd82f76ea0e7a2b0d060cee553		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6EAC 8444 bytes

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