Malicious PDF — malware analysis report

Static analysis result for SHA-256 0e91f53413b1886f…

MALICIOUS

PDF

42.8 KB Created: 2020-03-17 17:02:50 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 41f5eebd1309becda137dab9d63e05af SHA-1: 4dfdcd995c4508d1b98894c7f0cf2e5edec64323 SHA-256: 0e91f53413b1886faac9adfa2ef83b3a584815bbe468bdbdcad5c7d659add524
96 Risk Score

Malware Insights

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

The PDF document contains a large number of external links, many of which point to other PDF files hosted on various domains. The document body suggests a lure for downloading printer drivers, which is a common tactic for distributing malware. The ML classifier strongly indicated maliciousness, and the extensive link farm suggests an attempt to obscure the true malicious intent or to generate traffic for SEO purposes, potentially leading to malicious downloads.

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://travelmiwithme.com/uploads/1/3/0/2/130272403/130272403.html#canon+imageclass+mf4350d+scanner+driver+download
    • http://goonmud.org/uploads/1/3/0/6/130605217/57a151a41b0bd.pdf
    • http://treesrusllc.net/uploads/1/3/0/7/130776200/9790650.pdf
    • http://ashleeelder.com/uploads/1/3/0/5/130589146/zalofesokos_zobowusunufufom_lofoj_jobajeda.pdf
    • http://energiaconproposito.org/uploads/1/3/0/6/130603676/fejibuwoma.pdf
    • http://westwindcafe.com/uploads/1/3/0/2/130271190/jijifu.pdf
    • http://www.pomecconsulting.com/uploads/1/3/0/5/130542908/pinireximut.pdf
    • http://mta-sts.hwangecons.org.uk/uploads/1/3/0/2/130289693/1355b9a.pdf
    • http://aaagospelminister.com/uploads/1/3/0/5/130542769/goxalidodifezukapiki.pdf
    • http://nedwaves.com/uploads/1/3/0/7/130740128/4057728.pdf
    • http://bulldogcleaningandrestoration.com/uploads/1/3/0/6/130621706/a62a266ff41f2.pdf
    • http://magryaudiovisual.com/uploads/1/3/0/2/130291536/liwezifural.pdf
    • http://talkupyouth.com/uploads/1/3/0/5/130550888/lenuroben_buwapeladav_mebekanu_poruz.pdf
    • http://www.insightmindful.com/uploads/1/3/0/6/130639747/eb92f27.pdf
    • http://nikkis-place.com/uploads/1/3/0/4/130483886/704866.pdf
    • http://havensaloncotati.com/uploads/1/3/0/3/130379681/wemoxizedamubuzig.pdf
    • http://zoombuyz.com/uploads/1/3/0/7/130739253/5524031.pdf
    • http://beyondbedside.com/uploads/1/3/0/7/130740378/3a24a.pdf
    • http://www.blackandright.net/uploads/1/3/0/3/130379248/nisedutunoz-xoridefapaku.pdf
    • http://mimiandnini.com/uploads/1/3/0/8/130814716/4546148.pdf
    • http://www.mutareintegritas.com/uploads/1/3/0/4/130488217/97d7faa.pdf
    • http://villaggiobaiadebahas.com/uploads/1/3/0/7/130740342/7322733.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_off00007ab0.bin
b5e484464ee21070511b89a4d8cae1d3a6c421df5c6b44a86991c4730bd78529		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7AB0 8596 bytes

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