Malicious PDF — malware analysis report

Static analysis result for SHA-256 0d11f938a2a32b9b…

MALICIOUS

PDF

35.7 KB Created: 2020-04-13 09:28:39 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 1fc45462251a4b688ddc4ccbd08add09 SHA-1: 3ff9ce227515f95f62d8902397ca268e0a7e9275 SHA-256: 0d11f938a2a32b9b74bc06a8ed5a33839dfafd4e97610648659be3cf53c52a0e
96 Risk Score

Malware Insights

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

This PDF file contains a large number of external links, a technique often used for SEO manipulation or to distribute further malicious content. The ML classifier strongly indicated maliciousness, and the PDF structure suggests it's designed to redirect users to numerous unrelated domains. No scripts were extracted, but the sheer volume of outbound links is highly suspicious.

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://distancelearningtoday.net/uploads/1/3/0/4/130479123/130479123.html#hodgens+powder+load+data
    • http://stringsandsprings.com/uploads/1/3/0/4/130483193/zumugu.pdf
    • http://thepostpakonline.com/uploads/1/3/0/4/130436354/0aecb65dc07b.pdf
    • http://chelseabulldogs.org/uploads/1/3/0/5/130545278/viwapenoke.pdf
    • http://ocsc-ny.com/uploads/1/3/1/3/131380953/7742817.pdf
    • http://centralathletic.com/uploads/1/3/0/8/130814516/2199709.pdf
    • http://markopaulo.net/uploads/1/3/1/4/131406893/1481533.pdf
    • http://undergroundproductz.com/uploads/1/3/1/6/131637271/5334870.pdf
    • http://littlelennisboutique.shop/uploads/1/3/0/6/130622063/7759405.pdf
    • http://oilyjourneys.net/uploads/1/3/0/5/130551282/bb7da467c729.pdf
    • http://overthereoverhere.com/uploads/1/3/0/3/130323462/lenoruvi.pdf
    • http://heyheylovely.com/uploads/1/3/0/7/130775076/valojapironumamak.pdf
    • http://transbless.com/uploads/1/3/0/2/130273625/7b4242bd.pdf
    • http://lovelyuntamedrituals.com/uploads/1/3/0/4/130436209/fuxawelasobuno_kotowisabewila.pdf
    • http://renewals.doubledutch.me/uploads/1/3/1/4/131407014/54b984b6.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_off0000650f.bin
42dd741ff8000505282239b6da918172c9ac165d9be78846d8e7f36d3aea5456		 pdf-font-stream PDF embedded font (sfnt) at offset 0x650F 7636 bytes

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