Malicious PDF — malware analysis report

Static analysis result for SHA-256 312e947a8c1b330b…

MALICIOUS

PDF

41.1 KB Created: 2020-03-08 10:36:53 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 3081a800ca22617ffdab339e3c203559 SHA-1: f40e7d9c2ce7cd75ecade74da55700104542c592 SHA-256: 312e947a8c1b330b7f2fc4dc4ebc3b343f8a6890b5836edeb8cced3bf2b098a0
94 Risk Score

Malware Insights

MITRE ATT&CK
T1059.001 PowerShell

The PDF document contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic. These links point to various domains, suggesting a link farm or a distribution mechanism for malicious content. The ML classifier also strongly indicated maliciousness. 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://encore00028.voyagerwebsites.com/uploads/1/3/0/5/130551935/130551935.html#reported+speech+worksheets+pdf
    • http://www.brmarkgregory.com/uploads/1/3/0/7/130738732/wevemiziwibano.pdf
    • http://malibubartending.co/uploads/1/3/0/5/130540072/fikavekufezelako.pdf
    • http://myfiestaofeight.com/uploads/1/3/0/6/130639500/kanugefubere.pdf
    • http://www.bir-limited.com/uploads/1/3/0/8/130813975/8190103.pdf
    • http://rbminterests.com/uploads/1/3/0/2/130270869/doxukubusuxariz_guvedasu.pdf
    • http://lunacyrifleco.com/uploads/1/3/0/2/130288533/dogitamexede-fowilu-likopifopu.pdf
    • http://www.rrbeautyenthusiast.com/uploads/1/3/0/4/130435641/5220309.pdf
    • http://fordreplacementkey.org/uploads/1/3/0/6/130620792/mofikudinavar_topigobo.pdf
    • http://dylanscrazyplace.com/uploads/1/3/0/2/130272851/firiwugijonobabako.pdf
    • http://www.wrencheswithrock.com/uploads/1/3/0/7/130739280/c65d3d.pdf
    • http://hostmaster.johnnocasson.co.uk/uploads/1/3/0/5/130539758/lapazagesik.pdf
    • http://caymansonline.com/uploads/1/3/0/3/130313370/61093.pdf
    • http://missuniversevietnam2019.com/uploads/1/3/0/4/130488092/tibokuwu.pdf
    • http://xn--f1aaa.87reunion.com/uploads/1/3/0/5/130588151/b8e9e950f3188f.pdf
    • http://cissoise.com/uploads/1/3/0/7/130776309/8704378.pdf
    • http://www.thedaleylifeonline.com/uploads/1/3/0/9/130969681/8787643.pdf
    • http://n1-nw1-student-housing-studios-camden-kings-cross-london.co.uk/uploads/1/3/0/7/130776805/wuxafexuxivi_getefopevu_pudekubuku_jebedelaxawisaw.pdf
    • http://stpetefolkfair.com/uploads/1/3/0/4/130489669/fexivopotenaxozisoxi.pdf
    • http://theekklesiacenter.com/uploads/1/3/0/6/130604737/fazokuka-pijulonusesumaf-vogekutebonam.pdf
    • http://limoservice247.com/uploads/1/3/0/3/130379352/9565817.pdf
    • http://l-etro.com/uploads/1/3/0/5/130588939/milubevebuwewi.pdf
    • http://rainbowenergyalive.com/uploads/1/3/0/4/130483350/xuwosapikiberi_nomujilowezi_zejegadorav_zirolosesap.pdf
    • http://nationaldebtmgmt.com/uploads/1/3/0/2/130289729/492a610.pdf
    • http://myskinnycoffeedrink.com/uploads/1/3/0/6/130621808/tiguwubimijejaz.pdf
    • http://www.bedfordcountyrotary.org/uploads/1/3/0/2/130289177/gasifole.pdf
    • http://rainbowenergyalive.com/uploads/1/3/0/4/130483350/xuwosapikiberi_nom
    • 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_off0000783b.bin
87161d50256c03b37b68f19ec40a643e23d5cab9c2e7b8cf8689051fcbfc807b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x783B 7820 bytes

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