Malicious PDF — malware analysis report

Static analysis result for SHA-256 665a2a6f60b7c5c9…

MALICIOUS

PDF

38.9 KB Created: 2020-03-08 07:50:06 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 900893ae896248e5879bb265efda8a33 SHA-1: 85f528c0c84f19bfa96d09790e677ab7450472a1 SHA-256: 665a2a6f60b7c5c979e9f2ab85cb27af8ceb4c92f2d7173ff701b72ddf3a525b
96 Risk Score

Malware Insights

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

The PDF contains a large number of external links, identified as a 'PDF_SEO_LINK_FARM' heuristic, pointing to various domains. The ML classifier also flagged this PDF as malicious with high confidence. The embedded content, though obfuscated, includes URLs that are likely used to redirect users to malicious sites or to distribute further payloads.

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://autodiscover.storgebhs.com/uploads/1/3/0/5/130551585/130551585.html#albert+camus+the+outsider+analysis
    • http://stevenmarzolf.com/uploads/1/3/0/8/130874123/ravugo-naropaxaw-godolud.pdf
    • http://bneiakivadetroit.org/uploads/1/3/0/7/130738620/pekuvose_jikeso.pdf
    • http://gustingfuif.chirogust.be/uploads/1/3/0/6/130620416/pokasatu.pdf
    • http://keykidoll.com/uploads/1/3/0/6/130621819/pawozazavo.pdf
    • http://newhomebuildermelbourne.com.au/uploads/1/3/0/7/130739758/vamedakedib.pdf
    • http://drivelifewild.com/uploads/1/3/0/7/130776197/4631496.pdf
    • http://quantumlevelsoulhealing.com/uploads/1/3/0/6/130620616/gijudixajati-nekun.pdf
    • http://www.orlandosanchezfilms.net/uploads/1/3/0/6/130640048/wewasazeniwekamij.pdf
    • http://amyrasplicka.com/uploads/1/3/0/4/130483507/8863354.pdf
    • http://www.we2cangrow.com/uploads/1/3/0/5/130551745/mosoted.pdf
    • http://saluteminternational.com/uploads/1/3/0/6/130620501/lesivudagoremefi.pdf
    • http://brittanygiametta.com/uploads/1/3/0/5/130544790/judusi_wanerinejom.pdf
    • http://www.jeffreyirvinantiques.com/uploads/1/3/0/7/130775565/65ee94f2.pdf
    • http://aufstehen-gegen-linksfaschismus.org/uploads/1/3/0/7/130739713/1548459.pdf
    • http://www.auroraweddingandevents.co.uk/uploads/1/3/0/5/130588482/111433.pdf
    • http://144central.com/uploads/1/3/0/2/130289421/subanepoxomuma.pdf
    • http://elizabethtleern.com/uploads/1/3/0/7/130739240/8180092.pdf
    • http://principalgneely.com/uploads/1/3/0/7/130739474/xawiv.pdf
    • http://jessicatcohen.net/uploads/1/3/0/5/130544386/6527228.pdf
    • http://sansosh.club/uploads/1/3/0/5/130588290/rajiwogifo_jowakozewi_lukixegeda.pdf
    • http://buberonline.com/uploads/1/3/0/6/130621276/kunelabemi.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_off00007367.bin
72dfc07d54d2f3c72d2d31e2cab8171ad18f98359aded1c846f56c922f9ee270		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7367 6792 bytes

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