Malicious PDF — malware analysis report

Static analysis result for SHA-256 89e8e77f0e6b71fa…

MALICIOUS

PDF

37.6 KB Created: 2020-04-01 14:11:45 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 0ba1507b539fd0a1c51f71e21d348606 SHA-1: 86863f94f2619f9f22d5d2bac94196703adf36ad SHA-256: 89e8e77f0e6b71fa36677fbdfd9a80425b60cadbad0ee12583991b6130bdfa06
94 Risk Score

Malware Insights

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

This PDF document exhibits characteristics of a link farm or SEO spam, designed to drive traffic to numerous external websites. The document body, though partially corrupted, contains text related to project management and includes a prominent URL pointing to 'fundamentals of project management course'. The PDF_SEO_LINK_FARM heuristic firing confirms the presence of a mass of external links, with 'theslayway.org' identified as a dominant host. The ML classifier strongly indicates malicious intent.

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://vorahairrestoration.com/uploads/1/3/0/5/130551033/130551033.html#fundamentals+of+project+management+course
    • http://theslayway.org/uploads/1/3/0/8/130874127/f41816c.pdf
    • http://garycedeira.com/uploads/1/3/1/3/131382078/0e809505.pdf
    • http://indianaasianmassage.com/uploads/1/3/0/4/130488666/0b04d0bfd771.pdf
    • http://officeprocleaningllc.info/uploads/1/3/0/7/130775932/4355022.pdf
    • http://mylifehealthchart.com/uploads/1/3/0/5/130546923/aba242d9c184.pdf
    • http://tessafarrell.com/uploads/1/3/0/7/130776755/abd0d328f0.pdf
    • http://pkkassociates.com/uploads/1/3/0/7/130739261/68ef8241.pdf
    • http://periodicalmusic.com/uploads/1/3/0/7/130776047/vatiwezamira.pdf
    • http://fishevodevogeno.org/uploads/1/3/0/5/130545493/zaginudejovajo-jiwaridukimudog-sopadewexodira.pdf
    • http://fallriverkennel.com/uploads/1/3/0/6/130621206/xiwufuwuwumilemefure.pdf
    • http://christinamhs.com/uploads/1/3/0/9/130969999/gakititufepu.pdf
    • http://yoniroyaleshop.org/uploads/1/3/0/2/130271167/netiwinufaninuk.pdf
    • http://stjohncic.org/uploads/1/3/0/3/130379297/4c8245fb.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_off00006931.bin
a976086122c3418a986bb217a4f8a3ca92de46c676a2097a01d0c815b42e79d2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6931 8296 bytes

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